The Grim Adventures of Billy & Mandy

					
         


          

           


            
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.
Play as Eris:

Successfully complete Story mode with Billy, Mandy, Grim, or Irwin to unlock Eris.
Play as Fred Fredburger:

Successfully complete Story mode with Billy, Mandy, Grim, or Irwin to unlock Fred Fredburger.
Play as Hoss Delgado:

Successfully complete Mission 9 in Tier 1 in Mission mode to unlock Hoss Delgado.
Play as Mogar:

Successfully complete Story mode with Billy, Mandy, Grim, or Irwin to unlock Mogar.
Play as Nergal:

Successfully complete Story mode with Billy, Mandy, Grim, or Irwin to unlock Nergal.
Play as Nerglings:

Successfully complete Story mode with all characters to unlock Nerglings.
Play as Vikings:

Successfully complete Story mode with all characters and destroy every letter in the credits sequence to unlock Vikings.
Unlock Boogey:

In Mission Mode finish Mission 9 in "Tier 4".
Unlock Dracula:

In Mission Mode finish Mission 5 in "Tier 3".
Unlock Jack O'Lantern:

In Mission Mode finish Mission 9 in "Tier 2" .
Unlock Lord Pain:

Finish Mission 9 in Tier 5.
Unlock Nergal Jr.

In Mission Mode finish Mission 9 in "Tier 3".