Unlockable - Unlockable Characters |
| Lord Pain | Complete Mission 9 in Tier 5 |
| Eris | Beat "Story Mode" once with either Billy, Mandy, Grim, Or Irwin |
| Mogar | Beat "Story Mode" once with either Billy, Mandy, Grim, Or Irwin |
| Nergal | Beat "Story Mode" once with either Billy, Mandy, Grim, Or Irwin |
| Fred Fredburger | Beat "Story Mode" once with either Billy, Mandy, Grim, Or Irwin |
| Hoss Delgado | Beat Mission 9 in Tier 1 in "Mission Mode" |
| Chicken | Beat Story Mode with all characters on any difficulty with 10 hours of gameplay |
| Nerglings | Beat Story Mode with all characters on any difficulty |
| Vikings | Beat Story Mode with all characters and destroy every letter in the credits sequence |
| Jack O'Lantern | In Mission Mode beat Mission 9 in "Tier 2" |
| Nergal Jr. | In Mission Mode beat Mission 9 in "Tier 3" |
| Boogey | In Mission Mode beat Mission 9 in "Tier 4" |
| General Skarr | In Mission Mode beat Mission 6 in "Tier 4" |
| Dracula | In Mission Mode beat Mission 5 in "Tier 3" |
