Dark Project Software Link

Originally released as Thief: The Dark Project (later re-released as Thief Gold ), this is a first-person stealth game developed by Looking Glass Studios. It predates modern stealth-action hybrids — here, combat is actively punished, and the core loop is: avoid, distract, hide, steal .

If you mean as a tool — there is no known general-purpose software by that name (outside modding tools for Thief, e.g., DromEd — the level editor included with the game). dark project software