I'm the Boss Now
Not unlocked yetBeat a boss with max health
Extra Cheese
Not unlocked yetActivate a level password
The Smell of Cheaters in the Morning
Not unlocked yetActivate a cheat code
Livin' it up
Not unlocked yetCollect 25 lives
I'm Invincible!
Not unlocked yetCollect 25 invincibility powerups
Attackinator
Not unlocked yetCollect 25 extra attack powerups
Overachiever
Not unlocked yetAchievement awarded to achievers who achieve all of the achievements
BR00TAL
Not unlocked yetComplete game on Metal difficulty
ÜBER BR00TAL
Not unlocked yetComplete game on Death Metal difficulty
Metal Master
Not unlocked yetComplete Death Metal difficulty under 1 hour 15 minutes
Speed Metal
Not unlocked yetComplete Death Metal difficulty under 1 hour 30 minutes
Rocking the Metal Jesus
Not unlocked yetComplete Stage 4-2/defeat Metal Jesus Rocks
Repent, Sinner!
Not unlocked yetComplete Stage 8-2/defeat Alpha Omega Sin
Straight Outta the Street Act 2
Not unlocked yetComplete Stage 11
AI Destroyer Mark II
Not unlocked yetComplete Stage 11-2/defeat Gibletor again
Cog in the Machine
Not unlocked yetComplete Stage 12
Groupie Playa
Not unlocked yetComplete Stage 13
Head Banging
Not unlocked yetComplete Stage 13-2/defeat Metal Head boss
Mosh Pit
Not unlocked yetComplete Stage 14
Galactic Savior
Not unlocked yetComplete Stage 14-2/defeat Harvester
Lurker
Not unlocked yetMake Metal Head Boss spawn 5 sets of enemies/play complete song within a single fight
Guitar Shredding
Not unlocked yetUse a Guitar weapon
Payback
Not unlocked yetUse a Grey Alien Arm weapon
Jared the Mayonaise
Not unlocked yetKill 25 Mayo enemies