If u are type of person who prefers to discover things themself, watch out spoilers underneath

Activating safe mode (this will disable swastikas)
Shoot chandelier in the spawn room before round 2

Pack a punch
You need to collect 3 keys all found inside the main residence
- In the bureau/office hanging to the right upon entering from office hallway
- In the Conference room right next to the entrance
- In the post office inside a mail box

Engineer stations
First they require an activation which can be done in atomgrad after that every 30-60 seconds a challenge is gonna spawn in one of random locations:
-Map room/Conference room
-Atomgrad/Missile launch site
-Laboratories
-Tank factory
Upon interacting with terminal it will give a player challenge, if person fails it he has to wait another 30 seconds and another challenge will spawn in
If he completes it he will be rewarded a random blueprint which he can accept or refuse. After getting 3 blueprints player can craft his reward all recipies are found on the board in laboratories.

Shield
3 parts all found in the tank factory
- On the catwalk either in the corner or at the very end
- On ground floor either hanging by the crane or attached to tank
- On the bottom floor either underneath the tank, in the corner opposite of that or by the pipe when walking down stairs

Unlocking extra perk slots
-First zombie essence needs to be picked up, it will spawn somewhere in the pap room
-After that it needs to be placed in empty perk bottle found in the Atomgrad on the table next to claymores
-Now walking back to the library u will now be able to give perk bottle to keeper totem and he will offer u to do his trial (prepare well for it)

Unlocking RayGWR upgrade station
-First you have to get to 115 excavation site, to get there you need to jump inside the tube found in the missile launch site
-Once player gets there he has to interact with PC and enter the device
-Inside player will have to navigate how to escape it, after that pack a punched RayGWR can be upgraded to one of 4 variants

Unlocking a hero/specialist weapon
Player must find and eliminate 5 teddies with their weapon class
all teddies are found inside hangar of missile launch site:
Sniper - Laying on top of the catwalk next to yellow light (keep in mind that DMRs and semi-auto rifles do count, such as m14)
Heavy - To the left of claymores behind a gate (minigun does count)
Light - Hanging by the rope on top of the claymores (its recommended for players to keep their m1911 if they are going for hero weapon)
Assault - to the left of the data recorder
Shotgun - to the right of the mysterybox by the tires
Hero weapon will be waiting in behind a small gate in the same area keep in mind u keep it in your Specialist slot

Finding and eliminating Dr. Wolfking (Main ee)
-First step
Head to the conference room and knife the white map with red edges down
-After that 1 button will appear after interacting with it 4 more will spawn they all make sound
In the post office after laying down can be seen by the shelf
In the dining room by the quick revive behind the bookshelf
On second floor behind a pillar right before entering the power room
on the grand staircase behind a lantern

-Second step
Somewhere on the map wandering/idle zombie is gonna spawn upon killing him he will drop a punch card
(if he was killed by a nuke, punch card will be dropped in that place)

-Third step
Punchcard now needs to be placed inside a reader found inside conference room by a person who picked it up
-After interacting with it players now must answer 4 ringing phones all found inside a mansion

-Fourth step (need music turned on for this step)
Players now need to solve a puzzle, a secret door inside a conference room will now be open where players can start a global sequence
-Player must match correct national anthem to correct country by shooting them (only bullet weapons count, no splash damage)

-Fifth step
Now 4 soulboxes inside a map have been activated and have to be filled
In Library
In Lab
In Tank factory
In missile launch site

-Sixth step
Previously closed bathroom is now open and has a button that player can interact with
After that each round pressure plate is gonna spawn in, player has to stand on it for 45 seconds
In tank factory by the teleporter
Inside a post office
Behind a truck in missile launch site

-Seventh step
Player now need to destroy all 4 glowing devices found around the map, either melee or explosives must be used

-Final step
All players now must stand on the telepad found at the end of the hallway on second floor
After that they will be teleported to boss arena and defeat the boss, this will take away players weapon and will give them free pack a punched RayGHR
Upon teleporting players will have 30 seconds to prepare, on the island Perks, Weapons, Monkey bombs can be found
Wolfking other than attacking players with his arm and cannon has 3 special attacks
-Electric attack which will for a moment stun player
-Wipeout attack for a moment the sky will turn red and players have to quickly stand on blue squares with symbols on them otherwise theyll start taking damage
During this attack boss himself will teleport away so player only needs to worry about dogs and zombies
-Blinding attack during which he will attempt to teleport behind a player
After defeating him u have successfully completed the easter egg.