ACHIEVEMENT - HOW TO UNLOCK The Best of the Best (25 points) - Complete all single player levels 1-5 on Elite difficulty. Old Soldier (20 points) - Complete all single player levels 1-5. Co-op Campaigner (10 points) - Complete any multiplayer level. War of Attrition (20 points) - Kill 1000 aliens in single player. Vital Statistics (25 points) - Finish 'Primed' single player level with a score greater than 300,000. Indestructible (40 points) - Finish multiplayer level 'Cargo' without taking any damage. Praemonitus Praemunitus (10 points) - Collect all the logs throughout the game. Survivor (10 points) - Stay alive for 8 minutes on any of the Survival mode single player levels. Rapid Deployment (10 points) - Complete multiplayer level 'Cargo' in 10:00 or less. Super-Sleuth (10 points) - Find all secret collectibles. Deadly Assassin (10 points) - Kill 50 aliens in a row in single player without taking damage. Cash is King (10 points) - Achieve a balance of 20000 credits or more.