Use Notepad to edit the hitmanbloodmoney.ini file in the game folder. Add the following line to the end of the file:
Press [C] while playing to display the cheat menu. Press Up/Down to highlight a cheat option, then press [Enter] or Left/Right to toggle that option. 0 disables the cheat, while 1 enables it.
Show OSD: Toggle on screen display
Invisible Mode: Toggle invisibility
God Mode: Toggle God mode
Give Some: No effect
InfAmmo: Unlimited ammunition
Show enemy vision: No effect
GiveAll: No effect
InfClip: Unlimited ammunition in current clip
Test Cloth: Cycle through disguises in current level
Complete level: All objectives completed in current level
Time Multiplier: Speed up time; "10" is highest value
Teleport: Teleport through level's waypoints
Beam here: Teleport to pointer location
After enabling cheats, press [Shift] + [C] during game play to complete the current mission. If used at the start of the mission, it will complete it with a "Silent Assassin" rank.