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