Aliens vs. Predator: Extinction Cheats - PlayStation 2

Cheat mode
Press [Start] to pause game play in a campaign, then press [R1]x2, [L1], [R1], [L1]x2, [R1], [L1], [R1]x2, [L1], [R1], [L1]x2, [R1], [L1] to unlock the "Cheats" selection at the options menu. The cheat options include "Toggle Unit Spying", "Cheat Win", "Gimme $10000", "Show LZs", "Player Invulnerable", "Enable All Levels", and "Clear Fog Of War". Alternately, get the all gold medals in the game to unlock the same options.

Glitch: Blue screen
Enable cheat mode. With a help of the Drone, start a Queen's Nest. Before you have her lay eggs, set her to "No attack" and get the maximum units that you can have (43 eggs, the Drone and the Queen). With the Drone, arrange the eggs in a way you can see all of them in the viewport (screen). Select all eggs and hatch them. The PlayStation2 will freeze on a blue screen.

Glitch: Smartguns pointed backwards
On the Marine mission 6, enable cheat code and activate the "Toggle Unit Spying" cheat. Look for some hostile smartgunners. Their Smartguns should be pointed backwards.

Glitch: Wrong unit colors
On the last Alien mission, enable cheat code and activate the "Toggle Unit Spying" and "Clear Fog Of War" cheats. The Predators on the level should show up as blue and the Marines should show up as the predator color on your mini-map.