Ninja Tournament is a swordfighting mod for the Doom3 engine. The controls were fully reworked for this new release: Player movement is controlled in the same way as in the original Doom3 game, however, if you hold down the right mouse button, mouse movements are directly converted into sword movements. Faster swings deliver more damage and a sword held at an upright position can block incoming fromtal attacks. The mod includes single player original Doom3 levels and novel ninja challenges. Swordfighting is also available in multiplayer. The new version is available for download here: FileFront
Check out this forum thread if you like to participate in the first Ninja Tournament multiplayer test: Forum Thread