First open the defaults.ini file in the main dir with notepad and
change developer_mode = 0 to developer_mode = 1.
Then go to the /configs folder and add these lines to the
default.ini file - under the cheat key section (down at the bottom):
Keyboard, I, CTRL, ALT
Keyboard, X, CTRL, ALT
Keyboard, G, CTRL, ALT
Keyboard, K, CTRL, ALT
Hit the corresponding 3 keys to activate that cheat.
Note From Game Developer
The cheat key bindings were designed for developer use, and
improper use can break the scripted content, causing problems with the
game. Specifically the cheats can be used to destroy objects in the
game that are indestructible, which could cause missions to break.