There's still some unsolved secrets on this map. I'll tell you what they are or at least compile them together here, and in exchange, some help for getting the Dark Ray Gun. Examine the phone in the power room? Three ringing phones in '81, '53 and '81 again, then check the drawer in the power room? But how do we get the phones to ring? I don't take credit for these, these are from other posts I scraped together and gathered while playing to confirm.

FREE FIRE SALE: Examine the piano outside the power station and a familiar zombies theme will play. When it's finished a Fire Sale will drop.

FREE DEAD WIRE UPGRADE: REQUIRES UPGRADED GUN. YOUR ZJOLNIR SLEDGEHAMMER WONT REACH. Go to the Cafeteria, and go down the hall to the right past Double Tap. There to the left of the BAR wallbuy, look out the window and you'll see a purple lightning bolt powerup floating on top of the lamppost. Crouch down and aim through the broken glass in the lower part of the window to shoot it with a PaP'ed gun and it will gain the Dead Wire Alternate Ammo Type.

FREE THUNDERGUN: Nothing in this life comes free. To get the Thundergun, hang around outside in the courtyard area and surrounding exterior until the screen flashes white and triggers a Prison Riot. Hordes of zombies and Brutus will join the fray, so make sure you've loaded up on gear beforehand. You can also trigger this by interacting with the Riot Alarms in the Outbuilding for 2000 points after the first lockdown. Survive three lockdowns and examine the wooden box across from the alarms. "Explode to open", well throw a grenade at it and the Thundergun will be revealed.

ROCKET SHIELD: Three parts in 1 location, in the future.

- Lower Cellblock, on a small table in the room behind the cell where the teleporter is.
- In the Cafeteria, go into the narrow passage next to the stairs across from the DMR-14 wallbuy. There, overlooking the West Stairs is the part, which is weird because its resting at the top of those stairs.
- In the corner of the Pack-a-Punch room in the Warden's office, across and to the right by some garbage near the FARA 83 wallbuy.

Craft it at the Lower Cellblock table at the end of the hallway.

WUNDER-WALTHER: When going through the dream sequence in Step 4 of the easter egg, you will come to the 2nd set of teleporters from Part 2, whose signs read "Cellblock", "Cellblock", and "Caves". Look right and sitting on the corner is a barrel with a key on top of it. Examine it to pick it up. Once you finish the lockdown sequence, head back to the Outbuilding and examine the blue door directly next to the Riot Alarms to obtain the Wunder-Walther! A unique wonder weapon for Part 3! It cannot be upgraded but it will appear in the Mystery Box if replaced.

DUCK FLOATIES: Give the zombies duck floaties by shooting four ducks in the 1980s section. They're all in the following locations:

- The toilet across from the Walther Automatic Shotgun wallbuy.
- The left sink to the left of the LW1 - Tundra wallbuy.
- Facing opposite the shield table, the sink inside the last cell to the right; it's a spawn window.
- Inside the small wooden box under the ledge, opposite the Teleporter in the Offices.

Once all four ducks are shot or exploded the zombies will have their floaties.

If anyone has any info on how to trigger the phones to get the Dark Ray Gun on this map, please feel free to post here.