The game is indeed a FPS, and it is supposed to aim for realism. However, I found while playing it during its development that all engagements became rogue sniper matches. The classes did not compliment each other enough to play anything beyond the rifleman class. MGs and SMG classes were worthless, because all anyone would do is find good areas of concealment with good lines of fire and then wait for other players to stray into that line of fire.
This was because rifles ruled supreme in killing ability. So the volume of fire or suppressive ability of MGs didn’t matter, nor did the close support of SMGs (because you could never get in close enough to pepper someone with your SMG). If you did find someone prone and could sneak up on them, you had a pistol or knife to deal with them. Because all anyone would do was hide and snipe like this, some games seriously became nothing more than 12 to 20 players in fixed positions waiting for newbs to join the server and wander around getting killed over, and over, and over. I played once on a server and did nothing nor saw anyone else for 20mins before quitting. WE WERE ALL WAITING FOR ONE OF US TO GET UP AND BECOME A TARGET!
It was a well-crafted mod (from a visual-historical standpoint) with serious game play problems. To me it seemed like the dev team was way more interested on making the environments as real as possible rather than the core game play.