the game is FPS WWII type game, and you start out as infantry and progress in ranks to get different careerer paths unlocked, like do you wanna be a paratrooper to spawn behind enemy lines, operate a tanks, whatever.
It's well worth a play, especially since it's free, and it's easy to get into.
Personally i would say the infantry levels are much more fun and playing as a squad is more fun on top of that... playing solo isn't great though and their match making system for some maps ain't great... the game is still Beta thou so what do u expect
the most fun you get in this game imo if riding vehicles.... mainly bikes
... there's just something really entertaining about it in H&G