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