Grim Adventures of Billy & Mandy
Play as Chicken:
Successfully complete Story mode as all characters and
accumulate 10 hours of gameplay.
Play as Eris:
Successfully complete Story mode as Billy, Mandy, Grim, or Irwin.
Play as Fred Fredburger:
Succe.ssfully complete Story mode as Billy, Mandy, Grim, or Irwin
Play as Hoss Delgado:
Successfully complete Mission 9 in Tier 1 in Mission mode.
Play as Mogar:
Successfully complete Story mode as Billy, Mandy, Grim, or Irwin.
Play as Nergal:
Successfully complete Story mode as Billy, Mandy, Grim, or Irwin.
Play as Nerglings:
Successfully complete Story mode as all characters.
Play as Vikings:
Successfully complete Story mode as all characters &
destroy every letter in the credits sequence.
Alternate costumes:
Successfully complete Story mode with any character
to unlock an alternate costume for that person.