Heroes and Generals is a brand new free to play strategic FPS set in WW2 Europe. While its currently in beta and has its fair share of bugs, it already has an amazing amount of polish on it.
Playing like the love child of Battlefield and Total War its great fun to ride around the battlefield on a bicycle dodging tanks jeeps and all manner of other lovingly rendered 1940s era war machines. Overall the game looks great and plays great, and its free! So check it out and by all means sign up for their beta.