This guide shows the location of all secrets, Upgrade Points and secret levels in the single-player campaign, and the ways to get them.


A secret is an item that will increase the corresponding counter on the mission completion screen when picked up, regardless of its quality or how well it's hidden. Powerful and difficult to find items will not be considered secrets by the game if they do not trigger an increase to the counter. Similarly, items that are hard to miss will be counted as secrets as long as they increase the counter when picked up. Getting all of these will earn you the "No Stone Unturned" achievement.


Some Upgrade Points are secrets as defined above, but many are not. Those that do not count as secrets will be shown in their own section. Getting all of them will result in a perfect score on the mission completion screen.
Note that this only includes Upgrade Points that can be picked up as items, not those awarded for completing certain tasks. One additional Upgrade Point can be earned for recovering all cryotubes in each level that has them, and another one in each secret level by destroying 20 operators. One Super Upgrade Point for 40 destroyed operators per secret level. Those Upgrade Points will not be shown on the mission completion screen.


Ironically, secret levels are not considered secrets by the game and will therefore receive their own section.

1/6
Item: 12 Creepers
Description: In the room with the first Goblin, a secret door on the floor on the left side.
Location:


2/6
Item: 12 Creepers
Description: In the corridor with the Gorgon, there's a little area above.
Location:


3/6
Item: 12 Creepers
Description: Same place as #2, on the opposite side.

4/6
Item: 4 Hunters
Description: Behind a secret door at the top of the tunnel that leads down to the Energy Center.
Location:


5/6
Item: 4 Hunters
Description: The other Hunters right next to #4.

6/6
Item: Driller
Description: A secret door at the back of the room with #4 and #5.
Location:

1/15
Item: Armor
Description: A secret door on the floor right in front of the spawn point.
Location:


2/15
Item: Upgrade Point
Description: A secret door past the second normal door, right below it.
Required steps: Destroying the Control Panel right next to it is required to unlock the door.
Location:


3/15
Item: 4 Hunters
Description: On the opposite side in the same room as #2, there's a secret door at the bottom, guarded by a Gorgon.
Location:


4/15
Item: Upgrade Point
Description: Flying down to the lava area after the L1 security door, it's at the bottom, to the left.
Location:


5/15
Item: Log
Description: In a corner in the ceiling in the lava area.
Location:


6/15
Item: Cyclone
Description: At the end of the lower of the two tunnels past the lava area, there's a secret door at the bottom.
Location:


7/15
Item: 4 Hunters
Description: A secret door at the end of the middle tunnel past the lava area.
Location:


8/15
Item: 20 Falcons
Description: The room before the area with the Energy Center contains a secret door on the floor.
Location:


9/15
Item: Log
Description: A secret door inside the room with the L2 key, on the right side.
Location:


10/15
Item: Upgrade Point
Description: At the end of the corridor above #9.
Location:


11/15
Item: Energy
Description: A secret door on the ceiling before the L2 door.
Location:

Notes: The Control Panel unlocks the door leading to #12.

12/15
Item: 4 Hunters
Description: Same area as #11, a bit further away from the L2 door, also on the ceiling.
Required steps: Destroying the Control Panel next to #11 is necessary to unlock the door.
Location:


13/15
Item: Upgrade Point
Description: Behind a secret door next to #12.
Location:


14/15
Item: Log
Description: In the same room as #13, just around the corner.
Location:


15/15
Item: Armor
Description: On the opposite side of #14.


1/2
Description: In the first area after you exit the starting corridor, it's in the middle of a room and hard to miss.
Location:


2/2
Description: In the middle tunnel past the lava area.
Location:

1/16
Item: Upgrade Point
Description: A secret door right above the spawn point.
Required steps: The Control Panel to unlock the door is just a bit ahead.

Location:


2/16
Item: 4 Hunters
Description: In the corridor leading to the room with the exit door, there's a secret door on the ceiling.
Location:


3/16
Item: 4 Falcons
Description: A secret door on a wall near the exit door and the cryotube room.
Location:


4/16
Item: Upgrade Point
Description: In the room before the corridor leading to the L1 key, there's a secret door on the floor that leads to a room with several items inside.
Location:


5/16
Item: Log
Description: In the same room as #4.
Location:

6/16
Item: 20 Missile Pods
Description: In the same room as #4.
Location:

7/16
Item: Armor
Description: In the same room as #4.
Location:

8/16
Item: Energy
Description: In the same room as #4.
Location:

9/16
Item: 4 Hunters
Description: In the area before the L2 door, a secret door at the bottom on one side.
Location:

Notes: Contains one of two Control Panels needed to unlock the door leading to the secret level.

10/16
Item: 20 Missile Pods
Description: Same area as #9, on the opposite side.
Notes: Contains the other Control Panel needed for the secret level door.

11/16
Item: Log
Description: A secret door just past the L2 door.
Location:


12/16
Item: Overdrive
Description: At the other end of the corridor coming from #11.
Location:


13/16
Item: Upgrade Point
Description: In the room with the Energy Center, there's a secret door above the normal door.
Location:


14/16
Item: Driller
Description: A corner in the cave area before the reactor room.
Location:


15/16
Item: Upgrade Point
Description: On the left side after entering the reactor room, behind the pillar.
Location:


16/16
Item: Overdrive
Description: A secret door on the wall facing the exit door above the reactor.
Location:



1/2
Description: Heading right after the L2 door, there's an area below.
Location:


2/2
Description: In a room with an Auto-OP Fabricator, to the right after the room with the Energy Center.
Location:

Notes: Triggers the release of two Scorpions.


Name: Secret Level Alpha
Description: A secret door in the corridor leading to the L2 key.
Required steps: Destroying the Control Panels next to secret #9 and #10 unlocks the door.
Location:

Notes: 3 minute survival on Caverns.

1/15
Item: 4 Hunters
Description: A secret door on the ceiling above the Falcons right next to the spawn point.
Location:


2/15
Item: 4 Hunters
Description: Next to the tunnel with the first Energy Center, there's a secret door on the ceiling.
Location:


3/15
Item: 20 Missile Pods
Description: In a corner on the right side of the room with the L1 key, a secret door on the floor.
Location:


4/15
Item: Log
Description: Behind a secret door on the ceiling in the room before the L1 key.
Required steps: A Control Panel is in a corner at the bottom of the same room.

Location:


5/15
Item: Upgrade Point
Description: In the same room as #4.

6/15
Item: 20 Falcons
Description: A hidden door at the back of the same room.
Location:


7/15
Item: Reflex
Description: In the area to the left past the L1 door, behind an armor powerup.
Location:


8/15
Item: 100 Missile Pods
Description: A secret door on the ceiling in a room connected to the area with #7.
Location:


9/15
Item: 4 Hunters
Description: On the ceiling just before the cryotube room, there's a secret door.
Location:

Notes: The Control Panel unlocks the door to the cryotube room.

10/15
Item: 4 Falcons
Description: At the start of the tunnel that connects the cryotube room with the L2 door, there's a secret door in a corner at the bottom, below an energy powerup.
Location:


11/15
Item: Log
Description: Behind a secret door in the area in front of the L2 door.
Location:


12/15
Item: 16 Hunters
Description: In a room right below #11.
Location:

Notes: Triggers the release of two Scorpions.

13/15
Item: Upgrade Point
Description: In a room behind a secret door on the ceiling at the far end of the room past the L2 door.
Location:


14/15
Item: Upgrade Point
Description: In the Lockdown area to the right past the L2 door, there's a secret door on the floor.
Required steps: The Lockdown needs to be deactivated for the door to unlock. Picking up the Overdrive triggers the Lockdown.

Location:


15/15
Item: Overdrive
Description: A secret door on the right side of the ceiling in the room past the long tunnel leading down from the L2 door.
Location:



1/4
Description: In the area adjacent to the tunnel with the first Energy Center.
Location:


2/4
Description: In the same room as the L1 key.
Location:


3/4
Description: In the lava area below the L2 key.
Location:


4/4
Description: In a corner at the start of the tunnel that connects the cryotube room with the L2 door.
Location:

There aren't any L1 doors in this level. The first two security keys can be picked up in any order. The first will always be L1 and the second will be L2, so both are necessary to get past the L2 door. For this guide, the key inside the tower with lava at the bottom will be referred to as L1, and the other one as L2, even though it could be the other way if they are picked up in a different order.


1/16
Item: 12 Creepers
Description: A secret door in a corner on the side of the starting tower, guarded by a Kraken.
Location:


2/16
Item: Log
Description: In the lava area at the bottom of the tower with the L1 key.
Location:


3/16
Item: 16 Hunters
Description: An area around the tower with the L1 key has a secret door on the floor on the side, below an energy powerup.
Required steps: The Control Panel to unlock the door is on the ceiling above the door.
Location:


4/16
Item: Invulnerability
Description: In the same area as #3, on the other side.
Required steps: Identical to #3.

5/16
Item: Super Upgrade Point
Description: A secret door at the top of the tower containing the L1 key.
Required steps: The two Control Panels associated with the door are visible from the other side of the pillar.

Location:


6/16
Item: Flak
Description: In the Lockdown area accessible from the tower with the L1 key, a secret door at the far end.
Required steps: The Lockdown needs to be deactivated for the door to unlock.
Location:

Notes: The Control Panel next to it unlocks the door to the secret level.

7/16
Item: 4 Hunters
Description: A secret door in the tower containing the L2 key, near the Energy Center.
Location:


8/16
Item: 4 Hunters
Description: On the opposite side from #7.

9/16
Item: 12 Creepers
Description: At the top of the tower with the L2 key, there's a hidden room.
Location:

Notes: Entering the room triggers the release of two Scorpions.

10/16
Item: 12 Creepers
Description: The other Creepers right next to #9.

11/16
Item: Log
Description: At the back of the area with the L3 key, there's a secret door on the ceiling.
Required steps: The Control Panel to unlock the door is visible from a nearby position.

Location:


12/16
Item: Super Upgrade Point
Description: Just below #11.
Location:


13/16
Item: 20 Falcons
Description: A secret door on the ceiling in the reactor room.
Location:


14/16
Item: Energy
Description: Behind a secret door above the Auto-OP Fabricator facing the reactor.
Location:


15/16
Item: Invulnerability
Description: Same as #14.

16/16
Item: Energy
Description: Same as #14.


1/7
Description: To the left and down from the room with the lava in front of the L2 door, next to an Auto-OP Fabricator.
Location:


2/7
Description: Between the lava tunnels that connect the starting tower with the tower that contains the L1 key.
Location:


3/7
Description: In a corner in the tunnels below the tower with the L1 key.
Location:


4/7
Description: Inside the Lockdown area.
Location:


5/7
Description: Also inside the Lockdown area, on the opposite side of #4.

6/7
Description: Inside a cage in the tower with the L2 key, next to the Energy Center. Accessible through a secret door below it.
Required steps: Shoot the Control Panel through the openings in the grid on the side.
Location:


7/7
Description: In the reactor room, at the bottom.
Location:



Name: Secret Level Beta
Description: Behind a secret door in the Lockdown area.
Required steps: The Control Panel next to secret #6 needs to be destroyed to unlock the door.
Location:

Notes: 3 minute survival on Backfire.

Just like the previous level, this one is nonlinear, and the keys are numbered the way they are picked up. And this level needed to be split into two parts, because Steam has a character limit per section.


1/23
Item: Upgrade Point
Description: At the end of the starting tunnel, there's a secret door on the right side.
Required steps: The required Control Panel is on the ceiling nearby.

Location:

Notes: The Control Panel unlocks the door to #2 too.

2/23
Item: Log
Description: A secret door right below the spawn point
Required steps: The Control Panel that also unlocked #1.
Location:

Notes: The Control Panel unlocks the door to #3.

3/23
Item: 48 Creepers
Description: A secret door on the ceiling near the spawn point.
Required steps: The Control Panel next to #1 needs to be destroyed to unlock the door.
Location:


4/23
Item: 4 Hunters
Description: A secret door on the ceiling between two tunnels near the cryotube room.
Location:

Notes: The Control Panel unlocks the two doors leading to #5 and #6, one being right below.

5/23
Item: Invulnerability
Description: Right below #4 there's another secret door.
Required steps: Destroying the Control Panel next to #4 is necessary to unlock the door.
Location:


6/23
Item: 12 Creepers
Description: Just behind #5, at the top of the corridor.

7/23
Item: Armor
Description: Behind a secret door at the end of a corridor below the starting tunnel.
Location:


8/23
Item: 4 Hunters
Description: In a room right above #7, behind a secret door.
Location:


9/23
Item: 4 Hunters
Description: In the same room as #8.

10/23
Item: Upgrade Point
Description: Behind a secret door on the ceiling of the room with #7 and #8.
Location:

Notes: The Control Panel unlocks a door on a wall in the same room, which leads to a hidden Lockdown area. Destroying it releases two Scorpions.

11/23
Item: Super Upgrade Point
Description: Behind a door in a corner within the hidden Lockdown area.
Required steps: The door opens once the Lockdown is deactivated.
Location:


12/23
Item: 4 Devastators
Description: Behind a door on a wall inside the hidden Lockdown area.
Required steps: Destroying a Control Panel from below opens the door. The Control Panel is behind a secret door that opens once the Lockdown is deactivated.

Location:


13/23
Item: Overdrive
Description: Following the tunnels in front of the cryotube room to the right, there's a room at the end with a secret door on the floor.
Location:


14/23
Item: 12 Creepers
Description: A secret door on the ceiling in the room with a key and an Auto-OP Fabricator.
Location:


15/23
Item: Super Upgrade Point
Description: A corner on the ceiling in the cave tunnels.
Location:


16/23
Item: Log
Description: A secret door in a corner in the room with the Flak, below the Lockdown room.
Required steps: Two Control Panels on the ceiling in the same room unlock the door.

Location:


17/23
Item: Super Upgrade Point
Description: Right next to #16.

18/23
Item: Upgrade Point
Description: A secret door in a corner, inside the Lockdown room before one of the keys.
Location:


19/23
Item: 100 Missile Pods
Description: A secret door on the ceiling, in the area below one of the keys and #5 / #6.
Location:


20/23
Item: Log
Description: A secret door below one of the entrances to the Energy Center.
Location:


21/23
Item: 12 Creepers
Description: On the ceiling just past the L3 door.
Location:


22/23
Item: Upgrade Point
Description: A corner in the ceiling of the cave tunnel before the boss room.
Location:


23/23
Item: Super Upgrade Point
Description: A secret door at the bottom of the boss room near the entrance.
Required steps: The door opens when the boss is destroyed.
Location:

1/4
Description: In a corridor below the starting tunnel.
Location:


2/4
Description: In front of the cryotube room.
Location:


3/4
Description: In the same area as secret #19, accessible from the area with secret #5 and #6, or through a door after following the tunnels in front of the cryotube room to the right.
Location:


4/4
Description: Dropped by the boss.
Location:

1/18
Item: Log
Description: A secret door right above the spawn point.
Required steps: Two Control Panels are just ahead, the left one unlocks this door.

Location:

Notes: The right Control Panel unlocks the door to #2.

2/18
Item: Upgrade Point
Description: Behind a secret door inside the first room.
Required steps: The Control Panel encountered earlier.
Location:


3/18
Item: 4 Hunters
Description: A secret door on the ceiling, in the corridor to the right of the second room.
Location:

Notes: The Control Panel unlocks #4.

4/18
Item: Super Upgrade Point
Description: On the floor just before #3.
Required steps: The Control Panel next to #3 is required to unlock the door.
Location:


5/18
Item: 1 Devastator
Description: Further down the corridor on the floor, near the entrance to the cryotube room.
Location:


6/18
Item: Overdrive
Description: Right before the L1 door.
Location:


7/18
Item: 1 Devastator
Description: A secret door at the bottom just past the L1 door.
Location:


8/18
Item: Super Upgrade Point
Description: Inside the pillar in the middle of the lava past the L1 door.
Location:


9/18
Item: Energy
Description: In a room accessible through a secret door in the room with the L2 and L3 doors, in the corner with the Super Goblin facing the entrance.
Location:


10/18
Item: Energy
Description: On the opposite side of #9.

11/18
Item: 1 Nova
Description: In the same room as #9 and #10, behind the forcefield.
Required steps: Shoot one of the slanted walls with the Reflex to destroy the generator behind the forcefield.

Location:


12/18
Item: 1 Nova
Description: Right next to #11.

13/18
Item: Super Upgrade Point
Description: A secret door behind the generator in the same room.
Required steps: The Control Panel in the ceiling needs to be destroyed.

Location:

Notes: Destroying the Control Panel releases two Harpies.

14/18
Item: 20 Falcons
Description: Right behind the L2 door, there's a secret door on the ceiling.
Location:


15/18
Item: Super Upgrade Point
Description: In the area opposite of the Auto-OP Fabricators past the L2 door.
Required steps: The Control Panel between the L2 and L3 doors unlocks it.

Location:


16/18
Item: 16 Hunters
Description: A secret door on the floor, in the tunnel leading to the area with the L3 key.
Location:


17/18
Item: Overdrive
Description: On the ceiling past the L3 door.
Location:


18/18
Item: Invulnerability
Description: Next to the lava in front of the reactor.
Location:



1/7
Description: In a corner in the corridor right before the cryotube room.
Location:


2/7
Description: Right next to #1.

3/7
Description: At the bottom and in the middle of the big room past the corridors coming from the area around the cryotube room.
Location:


4/7
Description: In the area opposite of the Auto-OP generators behind the L2 door there's a lava area below.
Location:


5/7
Description: On the side of the tunnel that leads down to the reactor room, behind a pillar.
Location:


6/7
Description: On the opposite side of #5.

7/7
Description: Directly above the reactor.
Location:

1/21
Item: 1 Nova
Description: A secret door on the ceiling in the first room.
Location:


2/21
Item: Upgrade Point
Description: In a corridor accessible from the second room, near the entrance.
Required steps: The Control Panel is on the ceiling of the corridor.

Location:


3/21
Item: Log
Description: Next to #2.

4/21
Item: Upgrade Point
Description: In a tunnel behind a secret door at the bottom of the second roon.
Location:


5/21
Item: Upgrade Point
Description: In the area to the left of the second room, there's a secret door on the floor.
Location:


6/21
Item: Super Upgrade Point
Description: On the opposite side of the Auto-OP Fabricators.
Required steps: Destroying the Auto-OP Fabricators disables the forefield.
Location:


7/21
Item: 1 Nova
Description: A secret door in the corridor leading to the L1 key.
Location:


8/21
Item: 1 Devastator
Description: A shortcut back to the the second room from the area past the Auto-OP Fabricators.
Required steps: The doors open when the L1 key is picked up.
Location:


9/21
Item: 16 Hunters
Description: Behind a secret door right next to #4.
Required steps: The Control Panel to unlock the secret door is visible from the area in front of the door to the room with the L1 key.

Location:


10/21
Item: Armor
Description: In a corner on the left side of the first room past the L1 door.
Location:


11/21
Item: 100 Missile Pods
Description: A secret door in the top left corner of the second room past the L1 door.
Location:


12/21
Item: Super Ammo
Description: Behind two secret doors, accessible from the second room past the L1 door.
Required steps: The first door is unlocked by destroying a Control Panel aove it.

Location:


13/21
Item: Upgrade Point
Description: Next to the lava in the first cave room past the L1 door.
Location:


14/21
Item: 1 Devastator
Description: In the middle of the room near the L2 key, accessible from below.
Location:


15/21
Item: Invulnerability
Description: A secret door on the wall facing the L2 door.
Location:


16/21
Item: Super Upgrade Point
Description: Below the area in front of the L2 door, behind a forcefield.
Required steps: In the room past the L2 door, there's a Control Panel in a corner at the bottom. Destroying it removes the forcefield around the generator above, and destroying the generator removes another forcefield, revealing a second Control Panel below the first one. This Control Panel controls the forcefield in front of the secret room.


Location:


17/21
Item: Super Upgrade Point
Description: Right next to #16.

18/21
Item: 1 Devastator
Description: In a tunnel just before the area in front of the reactor room.
Location:


19/21
Item: Overdrive
Description: Behind a secret door in the Lockdown area.
Required steps: The required Control Panel is visible from the left side.

Location:


20/21
Item: Invulnerability
Description: A secret door on the left side of the reactor room.
Location:

Notes: Opening the door releases a Kraken on the opposite side.

21/21
Item: Super Upgrade Point
Description: In the reactor room, in a corner on they way to the exit.
Required steps: The generator on the opposite side needs to be destroyed to disable the forcefield. It's behind a locked door that opens once the reactor is destroyed.

Location:

1/4
Description: In the middle of the first room, hard to miss.
Location:


2/4
Description: In a corridor adjacent to the area left of the second room.
Location:


3/4
Description: At the top of the second room past the L1 door.
Location:


4/4
Description: In a corner on the wall next to the reactor.
Location:



Name: Secret Level Gamma
Description: Behind a secret door right next to secret #10.
Required steps: The Control Panel required to unlock the door is behind a secret door on the opposite side of the room.

Location:

Notes: 3 minute survival on Syrinx.

Another nonlinear level.


1/22
Item: 1 Devastator
Description: A secret door on the ceiling in the starting tunnel.
Location:


2/22
Item: Cloak
Description: In the caves between the starting tunnel and one Energy Center, in a corner in the ceiling.
Location:


3/22
Item: Armor
Description: Also in a corner, not far from #2.
Location:


4/22
Item: Super Upgrade Point
Description: In the caves near the starting area, somewhat close to the round tunnel.
Location:


5/22
Item: Log
Description: Just a bit further away from the spawn than #4.
Location:


6/22
Item: Cloak
Description: A secret door on the floor in front of the cryotube room.
Location:


7/22
Item: 1 Devastator
Description: A secret door in the room with a key and the Scourges, on the right side.
Required steps: The Auto-OP Fabricator needs to be destroyed to unlock the door.
Location:


8/22
Item: 1 Nova
Description: On the opposite side of #7.

9/22
Item: 24 Falcons
Description: A secret door on the ceiling, in a corner opposite of the key room with #7 and #8..
Location:


10/22
Item: Armor
Description: In a room accessible through a secret door right above #9.
Required steps: Two Control Panels need to be destroyed to unlock the door. They are behind secret doors visible from the ceiling of the key room with the Scourges.

Location:


11/22
Item: Armor
Description: Right next to #10.

12/22
Item: Super Upgrade Point
Description: In the same room as #10 and #11.
Notes: Picking it up releases two Golems and two Super Gorgons at the other end of the room.

13/22
Item: Super Upgrade Point
Description: Behind a door in the Lockdown room.
Required steps: The Lockdown needs to be deactivated for the door to open.
Location:


14/22
Item: Super Ammo
Description: A secret door just past the L2 door.
Location:


15/22
Item: Invulnerability
Description: A secret door right below the L3 key.
Location:


16/22
Item: Upgrade Point
Description: On the right side of the lava area with the L3 key, at the top of the lavafall.
Location:


17/22
Item: 16 Hunters
Description: In a room on the side of the lava area with the L3 key.
Location:


18/22
Item: Super Upgrade Point
Description: On the left side of the lava area with the L3 key, in the ceiling.
Location:


19/22
Item: 1 Devastator
Description: A secret door on the ceiling of the reactor room.
Location:


20/22
Item: 12 Creepers
Description: On the opposite side of #19.

21/22
Item: Invulnerability
Description: In the area below the reactor.
Location:


22/22
Item: Super Upgrade Point
Description: Right next to #21.


1/7
Description: In the round tunnel to the right of the starting area.
Required steps: The generator to disable the forcefield is on the opposite side.
Location:


2/7
Description: In a corner in front of the cryotube room.
Location:


3/7
Description: Behind a secret door right below one of the keys.
Location:


4/7
Description: In the caves between they key room with the Scourges and the L2 door.
Location:


5/7
Description: Next to #4.

6/7
Description: Above the L2 door.
Location:


7/7
Description: Just inside the reactor room, next to the Energy Center.
Location:

1/17
Item: Upgrade Point
Description: A secret door on the ceiling in the Energy Center in the starting room.
Location:


2/17
Item: Log
Description: On the opposite side of #1.

3/17
Item: 100 Missil ePods
Description: A secret door on the floor before the L1 key.
Location:


4/17
Item: Cloak
Description: In the area to the right of the right L1 door, there's a secret door on the ceiling in the corridor.
Location:


5/17
Item: 1 Devastator
Description: At the other of the the same corridor with #4, a secret door on the floor.
Location:


6/17
Item: Upgrade Point
Description: Inside a room, accessible through a secret door on the floor in the middle of the corridor between #4 and #5.
Location:


7/17
Item: Super Upgrade Point
Description: In a room above the one containing #6, behind a locked door.
Required steps: The door needs to be opened from the other side by shooting the slanted wall with the Reflex through the ceiling from the room below.

Location:

Notes: There are two generators that power the forcefields behind secret doors on the walls in the same room. Destroying them will release an Auto-OP Fabricator behind another secret door.

8/17
Item: 6 Novas
Description: Next to #7.

9/17
Item: 20 Missile Pods
Description: A secret door on the ceiling right past the left L1 door, in front of the cryotuoe room.
Location:

Notes: The Control Panel next to it unlocks the cryotube room.

10/17
Item: Super Upgraed Point
Description: At the end of the round tunnel below the cryotube room, there's a secret door on the floor.
Location:


11/17
Item: 24 Falcons
Description: A secret door on the ceiling in the area that's below the cryotube room and in front of the tunnel leading to the L2 door.
Location:


12/17
Item: 1 Devastator
Description: At the bottom of the area with the L2 key.
Location:


13/17
Item: 1 Devastator
Description: In the tunnel leading to the L2 door, at the bottom before the Thunderbolt.
Location:


1417
Item: Cloak
Description: A secret door at the back of the area with the L3 key.
Location:

Notes: Destrying the Control Panel next to it unlocks the door to #15.

15/17
Item: Super Upgrade Point
Description: A secret door in the corridor leading to the L3 key.
Required steps: The Control Panel next to #14 needs to be destroyed to unlock the door.
Location:


16/17
Item: Overdrive
Description: Between the L2 and L3 door in the area on the other side of the Energy Center, there's a hidden door on the floor.
Location:

Notes: Destroying any of the two nearby generators prior to picking up this item will lock the door and prevent this secret and the secret level from being accessed without restarting the level.

17/17
Item: Super Upgrade Point
Description: To the left past the L3 door, on the bottom.
Location:



1/6
Description: At the top in the area with the two Auto-OP Fabricators, near the start.
Location:


2/6
Description: Right next to #1.

3/6
Description: Inside the area to the right of the right L1 door, in a corner on the right side.
Location:


4/6
Description: In front of the tunnel leading to the L2 door.
Location:


5/6
Description: At the bottom of the room with the L3 key.
Location:


6/6
Description: In the room before the reactor room, near the ceiling.
Location:



Name: Secret Level Delta
Description: Right next to secret #16.
Notes: 3 minute survival on Hive.
Destroying any of the two nearby generators prior to picking up the Overdrive (secret #16) will lock the door and prevent it and the secret level from being accessed without restarting the level.

1/22
Item: Cloak
Description: In a tunnel at the bottom of the cave area next to the starting room.
Location:


2/22
Item: Armor
Description: In a corner in the Lockdown area above the central room before the L1 door.
Required steps: The Control Panels protecting the door to the Lockdown area and the secrets with forcefields are just outside the room on the ceiling.

Location:


3/22
Item: Armor
Description: Just behind #2.

4/22
Item: 24 Falcons
Description: On the opposite side of #2 and #3.
Location:


5/22
Item: 16 Hunters
Description: Just behind #4.

6/22
Item: 1 Devastator
Description: A secret door near the L1 door.
Location:


7/22
Item: Upgrade Point
Description: In the room to the left of the central room, there's a secret door in a corner at the top.
Location:


8/22
Item: 1 Time Bomb
Description: A secret door on the floor in the central pillar, in the same room as #7.
Required steps: Disabling the forcefields requires destroying a Control Panel on a wall. This will also activate the nearby Auto-OP Fabricator.

Location:


9/22
Item: Invulnerability
Description: Another secret door in the same pillar as #8, at the top.
Location:

Notes: Right below it is Upgrade Point #2.

10/22
Item: 1 Time Bomb
Description: A secret door in a corner on the bottom of the room with the L1 key.
Location:


11/22
Item: 1 Devastator
Description: Behind a secret door just above the L1 key.
Location:


12/22
Item: Super Upgrade Point
Description: At the end of the corridor starting from #11
Location:


13/22
Item: 1 Time Bomb
Description: A secret door on the ceiling in the room with the L2 key.
Location:


14/22
Item: 20 Missile Pods
Description: In a room behind a secret door on the ceiling near the L2 door.
Location:


15/22
Item: 20 Missile Pods
Description: In the same room as #14.

16/22
Item: Invulnerability
Description: In an area accessible through another secret door in the room with #14 and #15.
Location:


17/22
Item: Log
Description: In the same area as #16.

18/22
Item: Overdrive
Description: A secret door in front of the cryotube room.
Location:


19/22
Item: Upgrade Point
Description: A secret door at the left end of the corridor in front of the door leading to the area with the L3 key.
Location:


20/22
Item: Super Upgrade Point
Description: A secret door at the opposite end of the corridor with #19.
Location:


21/22
Item: 1 Time Bomb
Description: A secret door on the wall in the boss room, right below the entrance.
Location:


22/22
Item: Overdrive
Description: At the bottom of the boss room on the right side, a secret door next to the wall.
Location:



1/9
Description: Inside the Lockdown area above the central room.
Required steps: Getting access to the Lockdown area requires one of the Control Panels shown under secret #2 to be destroyed.
Location:


2/9
Description: Right below secret #9.
Required steps: Same procedure as secret #8.

3/9
Description: Below the L1 door.
Location:


4/9
Description: In the room on the opposite side of the L2 door.
Location:

Notes: Getting near it triggers a Lockdown.

5/9
Description: Next to #4.

6/9
Description: At the bottom of the room past the L2 door, on the right side.
Location:


7/9
Description: Next to the L3 key.
Location:


8/9
Description: Dropped by the boss.
Location:


9/9
Description: In a corner on the side of the tunnel behind the exit door.
Location:

Notes: Can only be acquired after destroying the boss.

The first section before the L3 door is nonlinear.


1/21
Item: Log
Description: A secret door on the ceiling in front of the spawn point.
Location:


2/21
Item: 1 Time Bomb
Description: In the room to the left of the starting area, a secret door on the floor.
Location:


3/21
Item: Invulnerability
Description: A secret door on the way to/from one of the keys, close to the start.
Location:


4/21
Item: Super Upgrade Point
Description: In the tunnel to the right of the start, a secret door on the ceiling.
Location:


5/21
Item: Upgrade Point
Description: A secret door on the floor past the Accelerator Tunnels near the starting area.
Location:


6/21
Item: Log
Description: In a room behind a secret door on the floor, accessible from the room on the opposite side of the spawn point in the circular area at the top of the map.
Required steps: The required Control Panel is on the wall next to the door.
Location:


7/21
Item: Cloak
Description: In the same room as #6.

8/21
Item: 1 Time Bomb
Description: In the same room as #6 and #7.

9/21
Item: 24 Falcons
Description: A secret door on the ceiling, in the area below the Lockdown area with the Reavers.
Location:

Notes: The Control Panel next to it is one of two required to unlock the door to the secret level.

10/21
Item: 48 Creepers
Description: On the opposite side of #9.
Notes: The other Control Panel needed to access the secret level.

11/21
Item: Super Upgrade Point
Description: In a room behind a secret door, at the bottom of the room past the icy cave after the area containing #9 and #10.
Location:


12/21
Item: 100 Missile Pods
Description: On the opposite side of #11.

13/21
Item: 4 Hunters
Description: In the room before the Accelerator Tunnels after the area with #11 and #12, a secret door in a corner at the bottom.
Location:


14/21
Item: 4 Hunters
Description: On the opposite side of #13.

15/21
Item: Overdrive
Description: A secret door on the ceiling at the top of the large vertical area past the Accelerator Tunnels.
Location:

Notes: One of two Control Panels to disable the forcefield around the generator.

16/21
Item: Upgrade Point
Description: On the opposite side of #15.
Notes: The other Control Panel for the forcefield around the generator.

17/21
Item: Super Upgrade Point
Description: At the top in the middle of a secret Lockdown area.
Required steps: Destroying the generator exposed after destroying the Control Panels next to #15 and #16 will unlock two secret doors right above #15 and #16 that connect to the Lockdown area.
Location:

Notes: Going near the middle of the room triggers a Lockdown.
If the 6 Novas behind the forcefield between #15 and #16 are desired, the generator at the back of the Lockdown area powers that forcefield. That generator can be exposed by shooting two Control Panels below the Lockdown area through the grates on the floor. Not a secret, but still interesting.

18/21
Item: 1 Devastator
Description: Next to #17.

19/21
Item: 1 Devastator
Description: Next to #17.

20/21
Item: 1 Nova
Description: On one side of the secret Lockdown area, there's a secret door on the ceiling.
Location:

Notes: The secret door is locked during Lockdown, but not before or after.

21/21
Item: 1 Nova
Description: On the opposite side of #20.


1/6
Description: Next to the key behind the Accelerator Tunnels.
Location:


2/6
Description: In the cryotube room.
Location:


3/6
Description: In the icy cave on the side of the Lockdown area with the Reavers, before the tunnel leading to the Energy Center.
Location:


4/6
Description: Just before the forcefield at the very bottom of the large vertical area, there's a corridor on the ceiling.
Location:


5/6
Description: Just around the corner past the exit door above the reactor.
Location:

Notes: Can only be acquired after destroying the reactor.

6/6
Description: On the opposite side of #5.


Name: Secret Level Sigma
Description: A secret door on the floor below the Lockdown area with the Reavers.
Required steps: Destroying the Control Panels next to secret #9 and #10 unlocks the door.
Location:

Notes: 3 minute survival on Blizzard.
Destroying the reactor also unlocks this door even if the Control Panels are still intact.

This level has a point of no return. Once the forcefield to the alien ship is passed, a countdown is triggered and the level has to be finished within the given time limit.


1/17
Item: 1 Devastator
Description: A secret door at the end of the area past the first door.
Location:


2/17
Item: 16 Hunters
Description: Close to #1, at the bottom.
Location:


3/17
Item: Invulnerability
Description: A secret door in a corner in the area before the L1 doors.
Location:


4/17
Item: 24 Falcons
Description: On the opposite side of #3.

5/17
Item: 100 Missile Pods
Description: Just past the right L1 door, a secret door to the left of the turret.
Location:

Notes: The Control Panel belongs to the forcefield blocking #6.

6/17
Item: Super Upgrade Point
Description: Below the forcefield in the same room.
Required steps: The Control Panel next to #5 needs to be destroyed to disable the forcefield.

7/17
Item: Upgrade Point
Description: A secret door at the bottom of the room before the first Energy Center.
Location:


8/17
Item: Cloak
Description: A secret door in the room behind the first Energy Center.
Location:

Notes: The Control Panel belongs to the door to #9.

9/17
Item: Super Upgrade Point
Description: Behind a secret door in the middle of the same room.
Required steps: Destroying the Control Panel next to #8 is necessary to unlock the door.
Location:


10/17
Item: 1 Nova
Description: On the other end of the tunnel leading to the area with the L2 key, a secret door at the bottom.
Location:


11/17
Item: 1 Nova
Description: Next to #10.

12/17
Item: Upgrade Point
Description: A secret door in the circular tunnel around the L2 key.
Location:


13/17
Item: Overdrive
Description: In the same tunnel as #12, on the opposite side.

14/17
Item: Overdrive
Description: In the icy cave front of one of the L3 doors, below a bridge.
Location:


15/17
Item: Super Upgrade Point
Description: A secret door above one of the Accelerator Tunnels.
Location:


16/17
Item: 1 Devastator
Description: A secret door above the forcefield in front of the alien ship.
Location:


17/17
Item: Super Upgrade Point
Description: A secret door above another Accelerator Tunnel.
Required steps: The Control Panel to unlock the door can be accessed from the area behind the L2 door in the room with the L1 key.

Location:



1/3
Description: Behind forcefields in the area before the L1 doors.
Required steps: The generators that power the forcefields are in the next room.

Location:

Notes: Each destroyed generator will release a Phantom from behind the forcefield.

2/3
Description: Same as #1.

3/3
Description: At the top of the vertical area before the L1 key and the L2 doors.
Location:

This level has multiple points of no return. It is split into three major sections followed by two rooms at the end, separated by the doors opened with the Energy Switches.
The Lancer can be acquired in this level (in the second section), but it's not considered a secret.
When Energy Switches are shot with the Thunderbolt, doors stay open twice as long compared to the Lancer.


1/11
Item: Armor/Energy/Ammo
Description: In a corner in the ceiling just ahead of the spawn point.
Location:


2/11
Item: 100 Missile Pods
Description: A bit further ahead in the same area, also on the ceiling.
Location:


3/11
Item: Overdrive
Description: On the ceiling in the second section past the first Energy Switch door.
Location:


4/11
Item: 48 Creepers
Description: At the start of the third section past the two Energy Switch doors, there's a room behind an illusionary wall on the ceiling.
Location:

Notes: Picking up either of the items here will spawn two Spectralus.

5/11
Item: 16 Hunters
Description: Right next to #4.

6/11
Item: Invulnerability
Description: In the area near the start of the third section, there's another illusionary wall on the ceiling.
Location:


7/11
Item: 12 Vortexes
Description: Behind a forcefield in the upper part of the caves in the third section.
Required steps: This room can only be accessed through a tunnel with two locked doors. There are two Energy Switches nearby. One controls the second door and is next to the forcefield, the other one controls the first door and can be seen through a hole in the wall just a bit further ahead. The secret room can be reached by shooting the second Energy Switch first, followed by the first one, then hurrying through the tunnel. The timing is fairly strict.

Location:

Notes: Killing the Spectralus inside the room disables the forcefield.

8/11
Item: 4 Devastators
Description: A corner in the ceiling near the end of the third section.
Location:


9/11
Item: Cloak
Description: At the end of the third section, there's a tunnel around the back side with it on the ceiling.
Location:


10/11
Item: Behind an illusionary wall in the second last room.
Description: 16 Hunters
Location:


11/11
Item: 24 Falcons
Description: On the opposite side of #10.

Another level with multiple points of no return, split into four sections by the doors opened with the Energy Switches.


1/14
Item: 3 Vortexes
Description: Behind an illusionary wall on the ceiling in the room past the starting room.
Location:


2/14
Item: 48 Creepers
Description: In the area before the door to the second section, in a corner on the left side.
Location:


3/14
Item: Invulnerability
Description: An illusionary wall on the right side in the large room in the second section.
Location:


4/14
Item: Overdrive
Description: Behind an illusionary wall on the ceiling in the corridor before the Lancer, in the third section.
Location:


5/14
Item: Armor/Energy/Ammo
Description: Just above #4 behind another illusionary wall.
Location:


6/14
Item: Armor/Energy/Ammo
Description: Behind an illusionary wall at the end of the third section.
Location:


7/14
Item: Armor/Energy/Ammo
Description: Next to #6.

8/14
Item: Armor/Energy/Ammo
Description: Behind a locked door at the end of the tunnel in a secret area which is behind an illusionary wall below #6 and #7.
Required steps: Shooting the Energy Switch at the start of the tunnel opens the door. The timing can be fairly strict.

Location:

Notes: Opening the door from the other side with the Energy Switch will spawn two Inviculus outside.

9/14
Item: Armor/Energy/Ammo
Description: Next to #8.

10/14
Item: 16 Hunters
Description: Behind the forcefield encountered earlier, accessible through the portal in the room with #8 and #9.
Location:

Notes: Going through the portal will disable the forcefield.

11/14
Item: 6 Time Bombs
Description: Right below #10.

12/14
Item: Cloak
Description: An illusionary wall on the ceiling right at the start of the last section.
Location:


13/14
Item: 24 Falcons
Description: In the last section, in one of the upper rooms behind an illusionary wall on the ceiling.
Location:


14/14
Item: 100 Missile Pods
Description: Right next to #13.


Name: Secret Level Omega
Description: Right above secret #5.
Notes: 3 minute survival on Cyclonus.

1/9
Item: 12 Vortexes
Description: At the back of a secret room above the spawn point, behind an illusionary wall.
Required steps: All enemies in the room need to be destroyed to disable the forcefields.
Location:

Notes: Once the area is entered, the entrance will be blocked by a forcefield and several Inviculus will spawn.

2/9
Item: 100 Missile Pods
Description: Behind an illusionary wall on the ceiling in the same room as #1.
Location:


3/9
Item: Overdrive
Description: Next to #2.

4/9
Item: Invulnerability
Description: In the central area below the boss room, an illusionary wall at the bottom.
Location:


5/9
Item: 48 Creepers
Description: An illusionary wall next to the Energy Core that can only be reached through a portal.
Location:


6/9
Item: Cloak
Description: On the opposite side of #5.

7/9
Item: 24 Falcons
Description: An illusionary wall on the ceiling in the topmost tunnel.
Location:


8/9
Item: 16 Hunters
Description: Next to #7.

9/9
Item: Overdrive
Description: Behind an illusionary wall on the ceiling of the boss room.
Location:

All secrets in this level are located behind the forcefields before the lava area and only become accessible once the reactor is destroyed.


1/6
Item: Overdrive
Description: In the same place as secret #7 in level 1.
Location:


2/6
Item: 4 Devastators
Description: In the same place as secret #6 in level 1.
Location:


3/6
Item: 100 Missile Pods
Description: In the same place as secret #2 in level 1.
Location:


4/6
Item: 6 Novas
Description: In the same place as secret #3 in level 1.
Location:


5/6
Item: Cloak
Description: In the same place as secret #11 in level 1.
Location:


6/6
Item: 20 Falcons
Description: In the same place as secret #10 in level 1.
Location: