Fight me in Sqights! (Squad)
Squad is a military simulation FPS currently in the alpha phases of development. It's very similar to the play style of the Arma series of games, but with only multiplayer game modes. I won't go into great detail about all the current or upcoming features of the game, but it's pretty basic at the moment.
The gameplay relies heavily on communication between you and your squad and squad leader to leader. Basic military communication skills and tactics are key. If you don't know already know any of that stuff, the community is extremely helpful in guiding new players in the basics. It's not an easy game and those looking for action packed run and gun style play akin to Call of Duty will be disappointed.
If you're like me and have been longing for a solid milsim FPS like Arma, with out all the bugs and fussy controls, this is it. $40 is steep for an alpha, in the the small amount of time I have played it, I've had an absolute blast. Fite me.