Power - Turn on the power.
Rai K-84 - Throughout this Easter egg, also do the steps to get the Rai K-84
Keycard - Speak with Dr. Peck in Mission Control. Speak with Ravenov and pick up the keycard he gives.
Lockers - You will have to open three lockers and grab the item inside. The first locker is in the Equipment Storage. The second locker is in Engineering. the final locker is in the Colonel's Office at Military Command.
Mixer - Go to the Field Hospital and interact with the mixer. Now kill all the hellhounds that spawn. Interact with the mixer again to pick it up Take it over to the OPC and place it on the AC unit. Go back to Dr. Peck and listen to what he says.
Essence Trap - There will be a machine in the Data Center, on the wall next to speed cola and you have to pick up one of the essence traps. Now you will have to get three mimics to go into essence traps. these mimics can only spawn rom the drips found on the ground. You will have to get the mimics low on health so that the trap can pick it up. Don't hit headshots on the mimic when trying to damage it. Once you have gotten one mimic in a trap you have three minutes to go back to the machine where the traps came from and place it in there. Now do this two more times.
Floppy Disk - Once you have put in all three essence traps pick up the floppy disk that comes out. Take it over to the machine with a brain image in the Planning Offices. This open the doors to the upper OPC.
Aethermeter - Go and talk to Dr. Peck. Go to the locker with a code panel on it under the stairs in Mission Control. Pick up the Aethermeter that comes out. Go to the Scorched Defense and go into the left bunker where there will be a shovel to pick up.
Containers - Go to the Open Lot. Now in the corner under in the stairs next to the zombie windows and dig up a canister. Now lots of containers will spawn in and out of the buildings. Don't collect any of the containers. Look for one them that does not have black smoke in it and collect it. Now go to Jungle Defense and go in the open area in front of the bunkers. In the middle of one of the pathways you will be able to dig up another canister. It will spawn a yellow bubble around you. Stay in this bubble and kill everything that comes in. During this you could get the Rai K-84 part from the Mangler if you haven't yet. At this point you will need to have the Rai K-84 to advance further. Go to the right side entrance to the Field Hospital and dig up the Canister. Now from a distance, wherever the canister went, shoot it with the alternate ammo of the Rai K-84.
Crystals - Before you do this try to have weapons pack-a-punched, armor, and an artillery strike and enough salvage to buy another for the boss fight. Go back to each Aether Reactor that was used to turn on the power and place crystal in each one. Go to the OPC and listen to the dialogue.
Satellite - Get an essence trap and the final zombie of a round. Go to the Planning Office and interact with the desk. Now you have to move the blue dot over the yellow dots and see if it shows a USA flag, a Russia flag, or a question mark. Once you find the one with the question mark hold the interact button on it.
Boss Fight - Go back to the OPC and interact with the terminal. Now cutscene will play but that is not the end of the Easter egg. After its over you will have to fight Orda. Do not stand to close to it. Use your artillery strikes on the Orda. You can buy more at the buy station. Make sure to try and shoot it in its mouth. Once the Orda dies a cutscene will play and thats the end.