Area 51 Easter Eggs

To get to this room you must play the level "The Grays" Here are the steps to get there.

1. get off the gravity monorail you enter the level on. And enter through door at the end of the landing.

2. Turn right and enter a room. This room has an alien... more

-Go to the level just before the fake moon landing site.
-Just as your near the elevator which leads to the moon landing level you'll see a row of porta-potties
-Start clicking on them and in one of the middle ones you'll hear someone asking you to... more

After the first level, and when you go down the elevador, after killing all the aliens in the room, don't go to the next office room, look that direction and go forward a Little until you see where you can go right. Turn and there is the original arcade... more

This isn't quite a full list, but is such a cool Egg (and not really a cheat) that I hope it might be worth posting...

1 - Start the game, and choose to start from the beginning.
2 - After the opening "STAY LOW!", DON'T SHOOT ANYTHING. The aliens... more

OK, first off goto the mission where you are at the fake moon landing.
>-< then go get one battery and slaughter all life around you (except your life)
>-< put a battery in and kill the new people that show up.
>-<sit on top of the fake landing ship... more