Area 51 Cheats
Find and scan all five databank items in a level to unlock the secret for that level. The final secret of the game is unlocked when all prior secrets have been found.
Gray Alien in multi-player mode
After finishing campaign mode under hard difficulty.
Complete campaign mode under the medium difficulty.
Life Or Death Alien grenade upgrade
Search the dead soldier in one of the elevators where Cole starts the level to find a small key. Use it to open the small lockers in the first power conduit pit to find a databank item. It will upgrade the alien grenade so that it will track targets.
How to beat the Super Beast
When fighting the Super Beast, rather than running straight at him, run around in a circle. When he gets near an explosive barrel, shoot it. It does more damage then the BBG. Watch out for his plasma shooting arm as well. When you finish, Edgar will talk
Defeat the first Theta boss easy
To beat the first theta boss all you need to do is change to mutant and use your melee attack (R3) on him and the leapers. Whenever Theta or the leapers hurt you take a step back and use the leech attack (R1) on them to regain health. Then start using you
How to beat Grays
To defeat Grays that use shields, mutate and fire parasites at them. It will bring down the shields faster than any other weapon in the game.
How to beat Theta
(get full health before fighting the theta) when you are fighting the theta, run behind one of the blue glowing tank/barrel kinda things. wait for the theta to attack and blow them up. the theta should die and if you have full health you shouldn\'t die, y
In the earlier stages of the game, there are a few cabinets of the original Area 51 arcade game, complete with red and blue light-guns.