EDIT: The first thing we need to do is right away build the trample steam, then everyone should grab it and we should proceed to power. On the way (since I've memorized the Mahjong locations and symbols and stuff), I will check the Mahjong tiles and keep track of what's what colour and so on. The person who will be going to the M14's golden symbol will build and grab the Sliquifier for later use. We'll go back up to the roof where the tower is, then two people will jump over to the Trample Steam room. Now we will all jump on the elevators with the gold symbols (the elevator with the Bowie Knife, the elevator that leads to the Remington and MP5, and the two elevators right next to the Trample Steam table) to activate the first step of the Easter Egg.
Next one person from the roof building will jump across and continue down to the AN-94 room, continuing on and jumping onto the power building ON THE UPPER FLOOR, ABOVE THE AK-74U
. There should be a golden symbol there. The other person from the roof will go to the golden symbol to the left of the Semtexes. One person in the Trample Steam building will go up to the golden symbol near the M14. The other person from the Trample Steam building will go down the stairs near the SVU-AS and will go to the golden symbol in that circular room. It's right in the centre of the room. There's an elevator in that room if it helps with finding it.
I'm not sure how we're going to orchestrate this step (but it won't be me). Someone with a mic will have to order people to step on the symbols in order. If the person's symbol lights up, they will have to tell the group that that's what happened, and if the symbol doesn't or goes out, they will also have to let the group know. This will probably be the most difficult step. Once the 4 golden symbols have been lit up and Richtofen has spoken to us, we can move on.
The person in the SVU room will buy the SVU and proceed to shoot the small balls out of the mouths of the dragons on the power building roof. Then the person with the Sliquifier (the person who was at the golden symbol by the M14) will shoot the balls that appear in the lion statues in the starting room until they start to spin. This is now the start of the Richtofen side.
The person with the SVU will go down and through the power room to get to the roof, keeping their Trample Steam with them. The person near the AK-74u will do the same. Those two people will put their trample steams on the symbols near the stairs going down to the MP5, pointing at the tower. The person near the Semtexes will put their Trample Steam on the symbol around the corner (on the same level as the Semtexes) facing the tower. The person with the Sliquifier will put their Trample Steam on the symbol right in front of the M14.
With this done, Stuhlinger should hear a quote from Richtofen, then we will allow zombies to be killed by the Trample Steams (flinging them towards the tower) until another Richtofen quote is heard. We now only have the Mahjong step left. By this time, I will have collected enough locations of the Mahjong tiles to let the group know what the order will be for knifing the tower. Someone will have to buy the Galvaknuckles (I'm not sure when this should happen, maybe after we turn the power on and the person that will be going to the AK-74u symbol can withdraw money from the bank and buy them on his way down?) then come to the tower. The four corners of the tower should be glowing blue. There will be a Mahjong tile on one corner, facing the Trample Steam building. This is NORTH. Figure out the rest of the directions from there.
Following my instructions, the person with the Galvaknuckles will knife the four corners in the order specified, for example "NORTH, SOUTH, WEST, EAST". We should hear a Richtofen quote, the tower will light up blue, the dragon will breathe fire, and we will get all 6 perks, which will disappear when we go down.
Hopefully this works