• For the best experience, try to avoid reading the spoilers if possible, but they're there if you need them
  
• Depending on skill level and willingness to cheat, this will probably take at least 1-2 hours
  
• If you need to cheat: You can noclip and buy the doors that open Challenges 2, 4, 5, and 7 and progress from there. Also note that starting Challenges 2 and 6 will automatically progress to Round 15 and 20, respectively, if started mid-round and you are not already on or above said round
  
• All music is copyright-free
  
• Further clarification below, but if you can only do one of the endings, go with the Bad/Normal one

• There are 10 diamonds hidden around the map that will give you 500 points each, and an additional 4500 on the final one
  
• To unlock the Good Ending, 7 Furies must be shot--one in each challenge area
  
• Some perks can only be unlocked by completing challenges
  
• A hidden HK21 wallbuy
  
• Not every wallbuy and perk is what it seems . . .
  
• The Max Ammo drop gives you normal reserve ammo . . . but empties all your clips and grenades
  
• Pack-a-Punch will upgrade your weapon . . . but not to what you'd expect

How to complete this challenge: survive and get to the top. The lava will down you in ~2 seconds without Juggernog, ~3 seconds with Juggernog

Things to look out for:

• Diamond 1: Above the doorway in spawn
  
• Symbol 1: Under the stairs in spawn
  
• Quick Revive Challenge: Get 15 melee kills
  
• Symbol 2: On the ledge of the Quick Revive zombie spawn
  
• Symbol 3: Underneath the Electric Cherry zombie spawn
  
• Electric Cherry Challenge: Get 10 grenade kills
  
• Symbol 4: Behind Electric Cherry
  
• Double Tap Challenge: Get 50 headshot kills
  
• Symbol 5: To the left of Double Tap
  
• Diamond 2: On the floor to the left of Double Tap
  
• Juggernog Challenge: It's always open
  
• Symbol 6: In the torch to the right of Juggernog
  
• Fury 1: Above Juggernog
  
• Symbol 7: Across from the first Juggernog machine
  
• Diamond 3: In the torch to the right of the MP40
  
• Speed Cola Challenge: Shoot 10 symbols
  
• Symbol 8: To the right of Speed Cola
  
• Juggernog (again) Challenge: Get 300 kills
  
• Symbol 9: On the ledge above Juggernog
  
• Diamond 4: On the floor in front of the Juggernog zombie spawn
  
• Symbol 10: Above the Challenge 2 door
  
• Diamond 5: On the top of the chandelier at the top of the area

How to complete this challenge: Interact with the crystal, get 50 kills before you get crushed, and escape

Things to look out for:

• Diamond 6: In one of the elbows of the statue holding the crystal
  
• Fury 2: In the floor grate

How to complete this challenge: each floor tile is either trapped or untrapped; you will have to figure out which one of the 3 randomly-chosen safe paths it is. A trapped tile will shoot you once every 0.35 seconds while standing on it. You can survive 2 shots without Juggernog and 3 shots with Juggernog. These are the possible paths[imgur.com]

Things to look out for:

• Diamond 7: In the mouth of the skull on the left side of the room
  
• Fury 3: On the ceiling of the zombie spawn across from Mule Kick
  
• The traps can be disabled by pressing a button across from Mule Kick

How to complete this challenge: shoot the M72 Law starting at the red arrow to reveal the path

Things to look out for:

• Shoot the rock to the left of the room's entrance to reveal a lever. Pull this lever to reveal an HK21 wallbuy
  
• Diamond 8: On top of Pack-a-Punch
  
• Fury 4: On a stalactite in front of Pack-a-Punch
  
• The path can be revealed by pressing a button next to Pack-a-Punch

How to complete this challenge: collect 5 tablets to open the doors at the end of the area

Things to look out for:

• Tablet 1: on the backside of the second axe
  
• Tablet 2: on the first pedestal on the right
  
• Diamond 9: Behind the pedestal holding the second tablet
  
• Fury 5: On the wall directly below the pedestal not holding a tablet
  
• Tablet 3: on the first pedestal on the left
  
• Tablet 4: on the pedestal in the middle of the area
  
• Tablet 5: on the pedestal in front of the doors at the end of the area

How to complete this challenge: navigate the maze to get to the end. Your path will only light up when you are in the vicinity of a lantern. All the lights will turn on once the end has been reached. If you really want to spoil the fun, here's the solution[imgur.com]

Things to look out for:

• Diamond 10: On the floor in front of the Death Machine wallbuy
  
• Fury 6: On the ceiling on the center of the maze

How to complete this challenge: beat the parkour, retrieve the key, and beat the parkour again. Interact with the doors to complete the Bad/Normal ending

Things to look out for:

• Fury 7: On the underside of the platform after the oil slick parkour
  
• Good/Alternate Ending: If all 7 Furies have been shot, then the wall before the final parkour step will open, revealing the Good Ending