This achievement is again for completing skullbreaker. Even though there is a fate and fortune card now which allows you to enter the machine straight away, this will not unlock the achievement for completing skullhop (although it does give you the perks if you complete it and it should allow you to get the 10 combo achievement as well).
You must collect all 6 skulls in a single game, and then complete the actual game to unlock the achievement. This guide is taken from reddit
https://www.reddit.com/r/CODZombies/wiki/the-beast-from-beyo...
Although I have added and changed a few bits every now and then where unclear in my opinion. For some images on some of the locations go to the site and the skullbreaker is 75% down the page (easily found by CTRL-F and typing skullbreaker) During the guide if you are unsure whether you've collected a skull successfully, keep in mind that you can always go to the actual machine in the afterlife arcade in the theater to check how many skulls you have.
Skull 1
Cook a grenade to open a Fuse Box containing a Skull, locations below.
-Water Treatment Room above the door to Blue Bolts.
-When facing Bombstoppers, turn left and aim a bit up.
-In the Cargo Bay (area where you get the Entangler), above the stairs going down from the P-LAW
Then shoot the green skull that appears.
Skull 2
Navigate to the Cargo Bay and locate small Red Xs on the ground, 4 total will spawn, one for each player. Every player must stand on an X and defend them from Zombies until the Red Skull reaches the ceiling. Once complete you must run and jump off a Catwalk or higher up area and collect the Skull before it disappears, the Entangler will spawn in the center of the Cargo Bay. If failed you must go to the next round and redo the step. The red X's appear in a diamond shape. One will appear on the catwalk coming from spawn, one on the coloured containers to the left when coming from spawn. One on the opposite catwalk near the teleporter to Shaolin/theater and one will appear on the right hand side when coming from spawn, on the edge of the pit and near the container which you can walk through. With fewer players obviously fewer X's are needed. My advice for this step is to turn on cards like hide and seek, slow butt, etc. Anything which makes this easier. We tried to do this ASAP after turning on the power. Everybody buy a 2nd gun and go for it in one of the early rounds as zombies still spawn in smaller amounts and they are slower.
Skull 3
There are 2 lines of letters as shown in this picture here:
What you have to do is find all 4 symbols around the map. 3 of the symbols will be from the same line and 1 will be from the other line. You must ADS on the 1 that is on the different line from the others. (e.g. 3 symbols are from the line B then Aim Down Sight on the symbol in the line A) Here are the the location the symbols can be:
-Under Cryptid on table in Med Bay (Same room as where you do the horizontal/vertical puzzle for main easter egg)
-Container in Cargo Bay across from Trailblazers (When facing Trailblazers, turn left and follow the edge of the pit. You can go through a dark bit underneath some containers. Right there look on your left hand side against the containers)
-Barrier right of Racin' Stripes (Outside shaolin)
-Theater Ticket Booth Entrance (Looking in from the Arcade)
-Barrier beside N31L in Spawn (left of him)
-Barrier inside Mess Hall (when facing N31L, turn right and walk straight ahead to a barrier)
- Look behind you after you jump down to Tuff 'Nuff
-Left of the Mystery Wheel in front of the Theater
Depending on the sound you hear, you can tell whether you've aimed at the correct symbol. If you aim at the wrong symbol, the other symbols will disappear and you will have to do this step next round. So don't Aim Down Sight on one of the symbols until you know which one to aim at!
Skull 4
Navigate to Spawn by jumping down onto the catwalk (when coming from the large room with Bombstoppers) and locate a small Red X on the ground, stand on this X until a Colored Skull spawns in the room. There will now be paths of symbols on the ground, find the one which matches the color of your Skull, you must WALK and not run along the path without stopping or leaving, until you reach the 4th Skull. Walking over other coloured skulls will fail this step and if the timer runs out this also fails the step. This is best done BEFORE you do the floppy disk step in the main easter egg as doors will randomly close afterwards and N31L can turn on the electric water trap, which happens to be an area which you can cross. Also, when playing with multiple players, make sure that the other players are in a different area as they can screw the challenge up as well if they walk over a skull. Besides, make sure no zombies are in your way. If you fail this step, you can retry the next round.
Skull 5
A Chess Pieces will now spawn on the Chess Board in the Break Room. You must obtain 7 Chess Pieces located around then map, locations below, then complete the 8-Queen's puzzle Use this link to solve your puzzle:
http://thegingerjonny.com/chess_solver/
Here's a video on all chess piece locations:
Make sure to thoroughly check every location as the pieces are that small that you can easily look over them!
-Scale on Med Bay Counter (to your right when entering from cryptid table)
-Right of Couch in Break Room (right of blue couch)
-Bottom of Staircase near Spawn (on your leftwhen going to the water electricity trap)
-To the left of the chess board on a counter
-Up the ladder at Spawn
-Under the table with the Cryptid laying on it in the Med Bay
-To the right of the exit of the Exterior near the Proteus wallbuy
-In the Cargo Bay to the left of where the sheet metal for the PaP bridge would be
-In the Ops Center next to a giant pillar
-In a corner near Bombstoppers (to the left of bombstoppers)
-To the right of the morse code terminal in the corner
-In the hallway with the Proteus on the top level on the side opposite to the zombie barrier
Skull 6
Find 3 paper scraps in your game, align them up so you can see a code of inputs you must do. Paper locations:
-On a table in the Lunch Room
-In the theater washroom in a sink
-In the theater on left side of the concession booth
-In the Projection Room on a red tool bench
-In the Med Bay lying under green monitors lying on top of an open notebook.
-In the Med Bay next to the floppy disk on the table
If you've aligned them properly you should have a code of like 7-9 arrows.
Our code was ----- I Left Up ) ) Up Down Down ) ) Left Up Down I ------
Apparently you can interpret this code in 4 different ways (Maybe 2). We had to turn our papers 180 degrees as the code that made the skullbreaker machine open was: -- Down Up Right Up Up Down Down Right .--
Maybe turning the paper 90 degrees to the left or to the right can also result in a right combination. Either way, once you have your code stand in front of the Skullbreaker machine and aim at the screen. Input the code from your papers using your d-pad and the arcade machine will activate.
Note: You have to repeat this step if you fail the actual Skullbreaker game.
Regarding the actual fight, you will need to shoot any colour of cuves at the skulls. It is best to choose one colour and only shoot those, as multiple adjacent skulls hit with the same colour of cubes can be destroyed with a single nuke. After 3 waves of skulls the skullbreaker is finished and you will get your achievement. If you take too much time for a wave you will fail and you will have to redo the skullbreaker.
Here's a full video guide:
Any feedback is appreciated!
