Complete game with Ashley
Complete game with Nick
Complete game in co-op mode
Complete stage 1
Complete stage 2
Complete stage 3
Complete stage 4
Complete stage 5/defeat Skinny Chestknee
Complete stage 6
Complete stage 7
Complete stage 8
Complete stage 9/defeat Darth B.
Complete stage 10/defeat Overlord
Defeat bouncers in stage 3
Defeat robot boss in stage 6
Defeat Big Blue Alien miniboss
Defeat 25 aliens
Defeat 25 enemies
Earn enough energy points in minigame to earn a 1up
Complete mini-game
Earn an extra life from high score
Lose 25 lives
Beat a boss with max health
Activate a level password
Activate a cheat code
Collect 25 lives
Collect 25 invincibility powerups
Collect 25 extra attack powerups
Complete game on Metal difficulty
Complete game on Death Metal difficulty
Complete Death Metal difficulty under 1 hour 15 minutes
Complete Death Metal difficulty under 1 hour 30 minutes
Complete Stage 4-2/defeat Metal Jesus Rocks
Complete Stage 8-2/defeat Alpha Omega Sin
Complete Stage 11
Complete Stage 11-2/defeat Gibletor again
Complete Stage 12
Complete Stage 13
Complete Stage 13-2/defeat Metal Head boss
Complete Stage 14
Complete Stage 14-2/defeat Harvester
Make Metal Head Boss spawn 5 sets of enemies/play complete song within a single fight
Use a Guitar weapon
Use a Grey Alien Arm weapon
Kill 25 Mayo enemies
Trophy awarded to players who unlock all of the trophies
Complete stage 9
Complete stage 10
Defeat bouncers
Defeat robot boss
Defeat Big Blue Alien boss
Destroy one breakable object
Complete the game thrice
Complete stage 5
