The World is Safe For Now - 10 points
Complete the game once
True Hero - 25 points
Survive for 5:00 in Survival Mode.
The Fast Lane - 20 points
Complete the game in less than 3 hours
Ala Carte - 20 points
Complete a level without collecting any health or energy items
Key Master - 20 points
Collect all keycards
Playing with a Full Deck - 15 points
Unlock all alien forms by beating levels 1-10
Unscathed - 10 points
Defeat any level without getting hit
A Hero's Workout - 10 points
Defeat 50 enemies
A Hero's Marathon - 15 points
Defeat 300 enemies
No Time to Waste - 20 points
Post a time on all level leaderboards
Versatility - 15 points
Harm the final boss using each alien before delivering the final blow
All Powered Up - 20 points
Collect all energy and health extenders
