Let the Obsession begin. Again. This time, the entire forces of the netherworld have overrun Earth. To save her, you must descend into the stygian depths of Hell itself! Battle mightier, nastier, deadlier demons and monsters. Use more powerful weapons. Survive more mind-blowing explosions and more of the bloodiest, fiercest, most awesome blastfest ever! Play DOOM II solo, with two people over a modem, or with up to four players over a LAN (supporting IPX protocol). No matter which way you choose, get ready for adrenaline-pumping, action-packed excitement that's sure to give your heart a real workout.
'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.***