Beat the fourth boss.

Wield the knife in single player or co-op mode.

Perform a 10-Hit Combo in Arcade Mode

Perform a Free-Fall Transition

Enter the Hall of Fame with a fighter during Career Mode.

Rock out as Lemmy

Create a new custom tattoo

Complete at least one challenge for every instrument at Gold level or better

Hint: *a* B****a*

Hint: *e*** *c******y

Hint: *o ***b*

Hint: *e***w***d

Hint: ***v** **y*