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Complete all single player levels 1-5 on Elite difficulty
Complete all single player levels 1-5
Complete any multiplayer level
Kill 1000 aliens in single player
Stun 10 aliens with one Stun Grenade
Kill 10 aliens with one Frag Grenade
Collect all the logs throughout the game
Stay alive for 8 minutes on any single player Survivor level
Kill 250 aliens on any multiplayer Survivor level
Find all secret collectibles
Take 500 damage on 'Determination' single player mission without dying
More Speed, Less Haste
Complete 'Vengeance' single player level on Veteran difficulty in 17 minutes or less
Time to Party
Complete 3 Co-op Assault multiplayer games
Originally Contributed By: Guard Master
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