THE DARK MOD was once a total conversion of Doom 3, and is now a STANDALONE GAME with the release of TDM 2.0! A dark and moody stealth game, inspired by the Thief series by Looking Glass Studios.

the_MUKe says

10/10 - Agree (5) Disagree (2)

Excellent conversion of the original Thief principle to a modern, perfectly-suited engine (real-time lighting). Very close to the original series (Thief & Thief 2). Gameplay feels very similar, even with new (but useful) interaction possibilities.
The mod is supported by a huge community which provides several fan missions. Only a campaign is lacking.
Furthermore the mod team developed a tailored version of the Doom 3 map editor (called DarkRadiant).