Created by ArcaneX, The Thievery Mutator alters the way lighting affects the player, making hiding the in shadows from enemies easier. It also adds a lightgem to the UI so you know how visible you are to the enemy. Launched through the Mod Loader so installed in a similar fashion; Unzip to your \DeusEx\ folder and overwrite the "Help" and "System" Folders. Don't worry, nothing within those folders will be over written. The Help folder, Within the Deus Ex Core Directory, will contain another folder (Or several folders, I have added a separate folder with relevent files for each mod within the help folder for easier access later) called "Thievery Mutator". Inside this you will find more Information about the mod.