Key Master
Collect all keycards
20 ✓ September 23rd, 2012
Playing with a Full Deck
Unlock all alien forms by beating levels 1-10
15 ✓ September 23rd, 2012
The World is Safe For Now
Complete the game once
10 ✓ September 23rd, 2012
A Hero's Workout
Defeat 50 enemies
10 ✓ September 20th, 2012
True Hero
Survive for 5:00 in Survival Mode.
25 
No Time to Waste
Post a time on all level leaderboards.
20 
All Powered Up
Collect all energy and health extenders
20 
The Fast Lane
Complete the game in less than 3 hours
20 
Ala Carte
Complete a level without collecting any health or energy items
20 
Versatility
Harm the final boss using each alien before delivering the final blow.
15 
A Hero's Marathon
Defeat 300 enemies
15 
Unscathed
Defeat any level without getting hit
10