Escape Venusian Space
Get Empress Armada off planet Mercury
Destroy the Axis Of Evil's ultimate weapon
Max out one weapon
Buy Wicked Armor
Max out one statistic
Get a medal on any level
Get a gold medal on five different levels
Get a gold medal on ten different levels
Complete any level in Online Multiplayer Mode
Win three levels in 4-player Multiplayer Mode
Rescue Empress Armada without being crushed
Defeat a space mumba
Get a gold medal in levels 11, 12, and 13.
Accumulate 8888 units of carbon.