You can use the following codes while playing the game. Edit the "hitmancontracts.ini" file in the game folder (just place the following lines at the end of the file):
Quote:
EnableCheats 1
Then, enter one of the following codes:
Lethal charge: IOILEPOW
Gravity: IOIGRV
Boxing mode: IOIHITALI
Mega Force mode: IOIPOWER
Nail Gun mode: IOINGUN
Invincibility: IOIRULEZ
Restore health: IOIHITLEIF
Bomb: IOIER
Slow-motion mode: IOISLO
Cardboard tube weapon: IOIPENNY