Benjamin Pulido has released a demo of Doom 3 RPG, playable only 4 levels.
Content of Doom 3 RPG demo:
* 4 new levels
* New Sounds
* New menu
* Monsters of Doom RPG
Note: It is recommended to play without shadows for best quality.
Extract the d3rpg folder to the Doom 3 folder, run doom 3 load the mod and select you skill level.