Press the BACKSLASH KEY while playing to drop the message window. Enter backdraft to enable cheats. Type in the code for the respective cheat. Some versions of the game require pressing SHIFT + BACKSLASH KEY instead.

cmdlist console commands
moneytalks gain $666,666
mission <1-26> warp to mission ##
finish clear current mission
number view mission number
start restarts mission
daytime <0-24> set game time