Since the beginning of time, the forces of Order and Chaos have been engaged in an eternal struggle to decide the fate of all Creation. That struggle has now come to the Mortal Realm... and neither Man, Demon, nor Angel will be left unscathed.
'Doom: Fall of Mars - Conceptual Demo' is a pre-beta version of Doom FoM released a few weeks after it's announcement in august 2008.
This is the August 30th 2008 release. Here are some of the fixes if you have a previous version-
Update: August 30 2008: Technical Update Including HUD quick slots, Weapons, Enemies, Enemy info displays, Bosses, Items, and many bug fixes.
Update: August 27 2008: A quick update has been uploaded, fixes- Lag, Movement system, Screen shaking, In game menu.
***Please keep in mind that this is a VERY early release and is more of a concept than a game at this point.***