"Persistent Perks":
These are unlocked by meeting their condition (When unlocked they are kept for maps that use this system), a green powerup effect will appear infront of you when it happens as well as the "Easter Egg song teddy bear step sound". You can check which persistant perks you have in the Tab menu (If/When this is possible, If it is not then it will not have a way to check). The effects applied are per-player. If you lose a Persistent Perk you cannot re-acquire it the game. The following are the persistent perks:
* Quicker Revive:
 Effect - Increases Revival Speed by 200%.
 Requirement - Reviving someone 2-17 times (Amount chosen per player at the start of the game) in 1 game.
 Loss Requirement - Trying to revive someone and failing.
 Note - Can stack with Quick Revive. Revive message turns green.
* Juggernaut:
 Effect - Increases Health by 200%.
 Requirement - Pick yourself up 1-3 times (Amount chosen per player at the start of the game) using Who's Who in 1 game.
 Loss Requirement - Getting downed after Round 15, Being picked up by another player.
 Note - Can stack with Juggernog and Purple Juggernog.
* Overkill:
 Effect - Increases Headshot damage by 200%.
 Requirement - Get 2-3 collateral headshots with one bullet in a row.
 Loss Requirement - Killing 10-25 Zombies (Amount chosen per player at the start of the game) in a row without a Headshot.
 Note - No matter where you shoot a Zombie, their head will pop off (this effect is aesthetic).
* Instant Kill:
 Effect - Touching Zombies during an Insta-Kill power-up kills them instantly.
 Requirement - Killing no Zombies and not taking damage during 2 Insta-Kills in a row.
 Loss Requirement - Getting damaged by a Zombie during an Insta-Kill.
 Note - Insta-Kill's skull is red during Insta-Kill for you.
* Steel Barriers:
 Effect - Increases barrier strength by 200% for barriers repaired by you.
 Requirement - Repairing 250 barriers (that give points) in 1 game.
 Loss Requirement - Going 1 round without repairing a single barrier.
* Iron Curtain:
 Effect - Increases barrier strength for Carpenter power-ups picked up by you by 200%.
 Requirement - Killing a Zombie trying to come through a barricade before the Carpenter boards up all the Windows.
 Loss Requirement - Failing to kill a Zombie trying to come through a barricade before the Carpenter boards up all the windows.
* Cash Back:
 Effect - Recieve 1000 points after buying Perk-A-Colas.
 Requirement - Going prone infront of a Perk-A-Cola machine while or after (5 second window to go prone) buying it 65 times.
 Loss Requirement - Not going prone infront of a Per-A-Cola machine while or after (5 second window to go prone) buying it.
* Toy Box:
 Effect - Decreases chance of getting "Bad" weapons from the Mystery Box.
 Requirement - Take 1-5 weapons (Amount chosen per player at the start of the game) from the Mysterybox in a row.
 Loss Requirement - Not taking a Weapon from the Mysterybox when rolling the box.
* Tombstone:
 Effect - Keep all perks after going down except for one (In solo you lose Quick Revive and in multiplayer you lose the last perk you obtained).
 Requirement - Purchase 4 perks before Round 5.
 Loss Requirement - Go down 3 times with no perks.
* Half-Off:
 Effect - All purchases cost half during Double Points power-up. If you are shy 100 or less points you can still purchase the item.
 Requirment - Get 3000+ points or no points during a single Double Points.
 Loss Requirement - Fail to spent 1000 points during the next Double Points power-up. Purchase something while being shy of the cost 3 times in a row.
* Double Points:
 Effect -Increases earned points by 200%.
 Requirement - Only inflict damage through Headshots and Melee during a Double points.
 Loss Requirement - Getting a headshot or melee kill not during a Double Points power-up.
* Low Accuracy:
 Effect - Increases earned points with bullet weapons by 200%.
 Requirement - Having a consistent bad accuracy with any gun, then killing 3-5 Zombies.
 Loss Requirement - Going above an accuracy of .75.
* Longshot:
 Effect - Earn an extra 300 points when getting kills with any Sniper Rifle.
 Requirement - Get 5-15 long range kills (Amount chosen per player at the start of the game) using any Sniper Rifle.
 Loss Requirement - Missing 3 shots in a row with any Sniper Rifle.
* Raygun Wall Buy:
 Effect - Recieve a Raygun for 500 points when buying an Shieva off the wall (Raygun Ammo - 250 Points / Pack-A-Punched Ammo = 4500).
 Requirement - Buy ammo for the Shieva 3-15 times before round 5.
 Loss Requirement - Enter Round 12-14 (If you have Lock-It Lager and make it through Round 12-14 its not possible to lose the Persistent Perk that game)(12-14 meaning the rounds 12-14 not 12, 13 or 14).
* Impact Grenade:
 Effect - Normal grenades explode on impact (Does not work with Widow's Wine Grenades, Only works with Normal Grenades).
 Requirement - Kill 1-3 Zombies (Amount chosen per player at the start of the game) in 1 round with the Grenade itself in a row.
 Loss Requirement - Obtaining Widows Wine.
* Sleight of Hand:
 Effect - Increases reload speed by 200%.
 Requirement - Reload 100 times with the same Weapon before round 15.
 Loss Requirement - Let clip run all the way out before reloading.
 Notes - Stacks with Speed Cola & Purple Speed Cola.
* Stamina:
 Effect - Increases running duration by 200%.
 Requirement -  Sprint 1-5 miles (Amount chosen per player at the start of the game) in one game.
 Loss Requirement - Fail to Sprint 1-5 (Amount chosen per player at the start of the game) miles in one game.
 Notes - Stacks with Stamina-Up and Purple Stamina-Up.
* Melee:
 Effect - Increases Melee speed and damage by 200%.
 Requirement - Melee kill 100 zombies while not under the effect of Insta-Kill.
 Loss Requirement - Miss 10 Melees in 1 game.