Make it all the way through level 3.
Make it all the way through level 2.
Destroy 30 enemies without using your forward shooting weapon.
Destroy 3 or more mystery objects.
Make it all the way through level 1.
Destroy 30 enemies without once dropping a bomb
Complete the entire game without losing any lives.
Make it all the way through level 4.
Make it all the way through level 5.
Successfully destroy the enemy base!
Destroy 10 or more fuel containers on level 1.
Obtain a score of 30,000 or more while playing an Xbox Live co-op game.
