Arx - End Of Sun is a new free and fan made game that is based on the first person dungeon RPG : Arx Fatalis developed by Arkane Studios. In our game world you will play out the events ( with a liberal dose of poetic licence ) that precede the original story of Arx Fatalis. You will no longer require a copy of Doom3 to play Arx - End Of Sun. We are now running on a custom version of the engine code and we use no assets from any commercial titles in our game.
Well, Neurological has the gift when it comes to GUI's in the D3 engine. Lots of SDK code to implement item pickup, use & drop - but that is nothing with out a great UI!