Welcome to Aliens vs. Predator Extinction. Whether you're a thin-skinned Human, buck-toothed Predator or vaguely phallic Alien, this game has something for you to kill. After all, extinction is the name of the game.

If you're tearing your hair (or extraterrestrial equivalent thereof) out over a particular mission, wondering what the best formations for your troops are or just looking for tips on how to kill most effectively, this is the guide for you. With full walkthroughs for all 21 missions as well as detailed tips, strategies and...well...more tips and strategies, this guide will provide you with everything you need to wipe another species off the face of the planet.

In this guide you'll find:

• General Tips
• Marines (Tips, strengths, weaknesses, walkthrough)
• Predators (Tips, strengths, weaknesses, walkthrough)
• Aliens (Tips, strengths, weaknesses, walkthrough)

Now go forth and make some stuff extinct!

Get the guide here.

To unlock Cheat Mode, pause the game and press R1, R1, L1, R1, L1, L1, R1, L1, R1, R1, L1, R1, L1, L1, R1, L1. Now, a number of Cheats will be available from the Options menu:

• Cheat Win
• Clear Fog of War
• Enable All Levels
• Gimme $10,000
• Player Invulnerable
• Show LZs
• Toggle Unit Spying