Completed all campaigns under normal difficulty.
Completed all campaigns under veteran difficulty.
Completed all campaigns under noob difficulty.
Shot down 500 UFOs.
Played in Local CO-OP Mode.
Scored 2,500,000 points or more during any single stage.
Defeated Terror Cracker.
Defeated Dread Feller.
Defeated Turborghini.
Defeated War Gear III.
Defeated the Roaring Steam.
Defeated the Lord of War.
Defeated Big Dora.
Performed 10x hits.
Been bumped into by a supply robot.
Complete a stage without receiving a single hit.
Defeat all enemies in Stage 1(Noob).
Defeat all enemies in Stage 2(Noob).
Defeat all enemies in Stage 3(Noob).
Defeat all enemies in Stage 1(Normal).
Defeat all enemies in Stage 2(Normal).
Defeat all enemies in Stage 3(Normal).
Defeat all enemies in Stage 4(Normal).
Defeat all enemies in Stage 5(Normal).