The winner of the 'Make Something Unreal' 1-million buck mod contest, Red Orchestra, is now being made into a full retail game, using the Unreal 2.5 engine. Instead of being just another FPS, this game is focused on realism, based on the Russian front of WW2, a side that's not often the main focus in games.
I've been itching for a realistic FPS, and have been holding out for Armed Assault, but after reading this interview http://www.gameinformer.com/News/Story/200....1901.19923.htm this game now seems very tempting. I'll probably wait out for the demo first, though.
The game is available for preload on Steam (http://www.steampowered.com), and can be preordered. Digital pricing is around 25$, with 10% off if you preorder. The demo will probably be after the game is released in March. Tripwire (the dev team) also has a deal to have the game appear in retail.
I definitely recommend reading that interview.
Official site: http://www.redorchestragame.com --> this also includes a trailer. Watch it and judge for yourself.