This is one of the most "realistic" WW2 multiplayer shooters. I played the free UT2004 mod version, which is well worth downloading, and might buy Ostfront. Not a run and gun arcade game. More like run and die, run and die, until you get the hang of it. Iron sights and many one shot kills, plus a few tanks and other vehicles to control.
In the mod version you had to watch where your anti-tank rounds went as they would bounce off at certain angles, so you aimed for magazines and weak spots. The tank and apc drivers could crank up an armored panel for a better view, but this made them vulnerable to small arms fire. Calling in artillery strikes was fun. Large maps and weak bot support in the mod version limited the appeal when playing at small home LAN parties. Never played the commercial version, which is also sold through Steam.