Note: This procedure requires editing a game file; creating a backup copy of the file before proceeding is recommended. With a text editor, edit the "difficulty.cfg" file in the "\Velvet Assassin\aio\" directory. Edit the various files as desired to change the game. For example, change the "NPCDamage = 1" to "NPCDamage = 0". You can also change the values in the "weapons.cfg" file in the same directory to adjust the weapons.
While playing the game, hold CTRL + SHIFT + O + E and press H to enable cheat mode. Then, press one of the following keys to activate the corresponding cheat:
CHEAT FUNCTION - KEY Toggle God mode - G Toggle Fly mode - X Toggle visibility - V Maximum armor - M Maximum ammo for current weapon - N +1,000 experience points - 8 Intended upgrade attributes - 7 Spawn explosives - 6 Spawn gas mask - 5 Spawn morphine - 9 Spawn next handgun - 2 Spawn next rifle - 1