Tannenberg is an early access FPS made by the creators of Verdun (M2H). The game tries to give the player an accurate experience of the eastfront in WW1. Known weapons like the Mauser Gewehr 98 are included with lots of detail. The gameplay consists of capturing different points on the map. Sadly there are not much players yet. But if you want to play realistic battles with the old uniforms and weapons its a game you should keep in mind.