things i've found:
1. after you go through the portal, to the left you'll find a frozen soldier holding a red book (able to be picked up)
2. There are posters with a perk bottle you are able to shoot and disappear
3. After assembling the radio there is a safe that is locked located in the control room (trying to figure out how to open it)
4. Right before entering the forest outpost (pack a punch building) to the right of the zombie barrier there is a sheet of paper with a roman numeral on it. First game I had II. Second game I have V.
5. To the right outside the playable area of the trip mines wallbuy, there is a red roman numeral, first game V. second game VI.
6. In the control room behind the bellhop cart outside of the playable area, a roman numeral can be found on a sheet of paper.
I believe these are all three numbers you need for whatever this step is for.

I SOMEHOW ACCIDENTALLY:
right before entering the portal on the desk you'll find reznov's hat. I somehow found Reznov's PPSH i can't figure out how to get it again. But i believe, maybe there is multiple hats.

Originally posted by Donaterro:

things i've found:
1. after you go through the portal, to the left you'll find a frozen soldier holding a red book (able to be picked up)
2. There are posters with a perk bottle you are able to shoot and disappear
3. After assembling the radio there is a safe that is locked located in the control room (trying to figure out how to open it)
4. Right before entering the forest outpost (pack a punch building) to the right of the zombie barrier there is a sheet of paper with a roman numeral on it. First game I had II. Second game I have V.
5. To the right outside the playable area of the trip mines wallbuy, there is a red roman numeral, first game V. second game VI.

I SOMEHOW ACCIDENTALLY:
right before entering the portal on the desk you'll find reznov's hat. I somehow found Reznov's PPSH i can't figure out how to get it again. But i believe, maybe there is multiple hats.

I think for number 2 there'll be 4 poster one for each original perk and it'll give you a free perk (I remember seeing the script for it on a bo3 mod tools website.) For 4 and 5 I'm guess those numbers go to the big number thing near pack (it's in it's own room and has 3 number displays.

For the "red book". Its a key card that you activate on a key reader in the control room, that unlocks a DOOM Easter Egg by armor machine.

Collect 3 radio pieces and build in Forest Outpost

Dynamite on the ground to the right of the tripmine, near ammo buy.

Satchel charge goes on "safe" to the left of armor machine and then get some battery looking item. Place on Stump near QR for soul box. Once Full pick up and carry to Double Tap and place in battery holder *YOU MOVE SLOW DURING THIS WARNING*

Enter Code where you built the radio in Forest Bunker
FOR ME
1st Number was by Tripmines
2nd Number was to the left of Portal going TO PAP in zombie spawn closest to mystery box spawn.
3rd Number was in zombie spawn just outside the actual PAP building

Wall Button near 2nd Number Spawn to start the final encounter *At time of posting Super Shotgun from DOOM Easter Egg destroyed the boss, didnt feel intentional so dev look into maybe?*

Couldn't find where the buyable ending was. so maybe was more to do after?

4 Red Posters with Girl in Crosshair - Melee them, and then Hunting Rifle spawns by Jugg

1 Spawn
1 on Barracks Door buy Tripmines
1 in Forest Output near GG Machine
1 by Armor Machine in Bunker

Shooting Perk Poster around the map potentially give extra perk slots? Found 3

Why is there a time limit for the boss fight

Originally posted by Giblet:

Why is there a time limit for the boss fight

can you tell me how to do it man

I actually cant find the third number

can someone upload screenshots on where the roman numbers are?

Collect 3 radio pieces and build in Forest Outpost

Dynamite on the ground to the right of the tripmine, near ammo buy.

Satchel charge goes on "safe" to the left of armor machine and then get some battery looking item. Place on Stump near QR for soul box. Once Full pick up and carry to Double Tap and place in battery holder *YOU MOVE SLOW DURING THIS WARNING*

Enter Code where you built the radio in Forest Bunker
FOR ME
1st Number was by Tripmines
2nd Number was to the left of Portal going TO PAP in zombie spawn closest to mystery box spawn.
3rd Number was in zombie spawn just outside the actual PAP building

Wall Button near 2nd Number Spawn to start the final encounter

When done buyable ending at spawn on bench next to reward

for boss fight i think we need PHD!
because boss keep trow grande

has anyone found anything with the knight painting in the room with the portal? I believe I interacted with it and got a voice line.

Two of the russian hats for the ppsh are in the portal room and near double tap.

map sucks