Complete Mission II.
Destroy 10 enemies using the melee attack.
Complete Mission I.
Finish any boss off using the melee attack.
Use the energy whip to collect an item.
Destroy 4 enemies using a single particle beam shot.
Destroy 6 enemies in a row using the charged particle beam.
Hang on the Gunship during Mission 1-3.
Kill the Spider Queen in less than 20 seconds.
Use the melee attack to finish Commander Zet off.
Use the melee attack to deflect missiles and grenades from enemies.
Get all the weapon upgrades on the 3D Tunnel Stage.
Destroy the Gorilla Boss's legs after defeating him.
Find the hidden 1UP on Mission 6.
Complete the game using any melee character.
Destroy your holographic clone on the final boss stage.
Complete the Boss Rush Mode.
Complete the game in Mirror Mode (any difficulty level).
Complete the game in EASY mode.
Complete the game in NORMAL mode.
Complete the game in HARDCORE mode.
Complete the game in less than 40 minutes in normal or hardcore mode.
Complete Mission I with the blue mech.
Complete Mission III.
Complete Mission III with the drill mech.
Complete Mission V with the orange mech.
Destroy 100 enemies using the melee attack.
Destroy 500 enemies using the melee attack.
Collect 50 battle bots.
Collect 100 weapons.
Destroy 500 enemies.
Destroy 1500 enemies.
Destroy 5000 enemies.
Complete Mission IV.
Complete Mission V.
Complete Mission VI.
Complete any mission without dying.
Destroy 3 enemies at once using an explosive barrel.
Destroy 4 enemies at once using the grenade launcher.
