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