Do these achievements to unlock the corresponding effect:
S1 Rune: complete the first group of four levels in survival mode
S2 Rune: complete the second group of four levels in survival
S3 Rune: complete the third group of four levels in survival mode
S4 Rune: complete the first group of four levels in expert survival mode
S5 Rune: complete the second group of four levels in expert survival mode
S6 Rune: complete the third group of four levels in expert survival mode
M1 Rune: complete the game on the easy difficulty setting
M2 Rune: complete a versus mode match with four human players
M3 Rune: complete the game on the normal difficulty setting
M4 Rune: complete ten co-op matches
M5 Rune: play twenty matches in multi-player versus mode that are not cooperative count
M6 Rune: complete twenty co-op matches
M7 Rune: play fifty matches in multi-player versus mode that are not cooperative count
M8 Rune: complete story mode on the hard difficulty setting
M9 Rune: complete the game with all four characters on any difficulty setting
Expert survival mode: complete the game in survival mode