Game Achievements:

• Against the Odds - Complete single player levels 1-5 on Elite difficulty (25 Gamerpoints)
• Ain't got time to bleed! - Complete 'Interface' single player mission without using a health pack (20 Gamerpoints)
• Born to Kill - Kill a total of 25 aliens in single player (10 Gamerpoints)
• Break Out the Arsenal - Fire every weapon and use every item in single player (10 Gamerpoints)
• Campaign Veteran - Complete all single player levels 1-5 (25 Gamerpoints)
• Elite Force - Kill 50 aliens in a row without taking damage in single player (10 Gamerpoints)
• Fighting Light - Complete any single player level without using any items (20 Gamerpoints)
• Hard to Kill - Complete CO-OP Assault level 1, 2 or 3 without either player dying (20 Gamerpoints)
• Killing Spree - Kill 20 aliens within 30 seconds in single player (10 Gamerpoints)
• Knowledge is Power - Collect all the logs throughout the game (20 Gamerpoints)
• No Stone Unturned - Find all secret collectibles (10 Gamerpoints)
• Team Veteran - Complete "Hydroponics" in Co-op Assault (20 Gamerpoints)