A game that died because it asked you to install windows vista in the year 2009 and even then most GPU's didn't support DX11 so they couldn't boot it up if they tried. This was made by former Remedy/demoscene guys who founded the benchmark company Futuremark so it looks leaps and bounds above most games at the time, especially in the indie scene, and still holds up well. It's 6DOF CoD4 with the ability to walk on any surface and turn off suit functions to hide yourself on the minimap (sound in this game is optional, which is sick).
This got delisted and whithered away into even more obscurity than it already had, but thankfully has bots for those who managed to get the game. I believe it was able to host dedicated servers as well so it might be easier than you think to resurrect this game.