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Roller Rumble For invulnerability in this game, use the DOS utility DEBUG. First backup your game to be edited, then type the following from the DOS prompt: For the CGA version of this game, type: ren roller.exe cheater.cht debug cheater.cht e 1e8d 90 90 90 90 e 31c7 75 Then type: w q For the EGA version of this game, type: ren roller.exe cheater.cht debug cheater.cht e 1e62 90 90 90 90 Then type: w q Then rename CHEATER.CHT back to its previous name.