Alien Ressurection Cheats for PlayStation
At the Main menu press Circle, Left, Right, Circle, Up, R2. If entered correctly a 'Cheat' selection will be available at the 'Options' screen which will unlock God mode, Level Selection, All Weapons, Infinite Ammunition, Infinite Oxygen and No Chest-Bursting.
Unlock Cheat Menu - Circle, Left, Right, Circle, Up, R2
Unlock Research - Square, Up, Down, Cirlce, Left, R1
How to get to the KING alien (rare)
Defeat newborn use cheat menu and put all cheats ON and go to research and put all top ones clear and then go to the level where the newborn is found.
It will be a maze at the end of the maze and you found him.