Prerequisites from the Mystery Box: One player with EMP Grenades.

Step 1A: Build the Turbine!
This is a mannequin near the map, and fan at the chair, and a wing underneath the phone at the spawn.

Step 1B: Build the OBELISK!(May already be built)

Step 2: Turn on the power
There will be 3 parts at a random location in the power room.

Step 3: Turn off the power
Do this when Maxis tells you to do so.

Step 4: Kill the electric zombie UNDERNEATH the Pylon!
At the pylon, survive through zombies until the electric zombie spawns.
When he does, TWO players place their turbines UNDERNEATH the pylon.
When the electric zombie gets near them both, Maxis will say kill it! Kill it now!, that's when you throw your EMP grenade at it and it should dissappear.
THIS IS THE TOUGHEST PART OF THE EASTER EGG

Step 5: Set up FOUR turbines in the following locations: TWO players set up their turbines at the pylon and the ONE person sets up a turbine at near the diner where the lamp (teleporter) is and ONE person sets up a turbine at the lamp between the Bank and the Power area.

Step 6: WOO ACHIEVEMENT!