SUMMARY
VERDUN is a MMOFPS set during the first World War. It is in open beta testing right now as a Unity3D browser game and a "standalone" full release is expected within the year. I tried finding this game here and I could not, so I apologize if this has already been listed.
LINKS
http://beta.verdungame.com/ - The open beta version of the game
http://www.verdungame.com/ - Main website for game