Survive for 5:00 in Survival Mode.
Defeat 300 enemies
Collect all energy and health extenders
Complete the game once
Harm the final boss using each alien before delivering the final blow.
Collect all keycards
Unlock all alien forms by beating levels 1-10
Defeat 50 enemies
Defeat any level without getting hit
Complete a level without collecting any health or energy items
Post a time on all level leaderboards.
Complete the game in less than 3 hours
