Guild of Darkness is a mod for registered Wolfenstein, made by Tetraarchangel. It was released on June 4, 2002.
The mod is based on Wolfenstein Collection, but features numerous coding changes. The running tempo of the guards has been cranked to the extreme, making for a bizarre gameplay, also underlined by numerous textures making references to "42", "Satchmo", "Bono" and "R".
The maximum ammo rate has been raised to 999, and the player's health can be extended well beyond 200 %.
An extensive storyline and level guide was attached, adding some clarity.