There’s a few classes of free-to-play first person shooter. There’s the old and the ugly, usually trying to ape Counter-Strike in some way… your BlackShots and Sudden Attacks. Above that there are the high production value splashes of yesteryear, your A.V.A.’s and Genesis A.D.’s (rest in peace).
Nowadays with things like Warface and Blacklight Retribution being free and making that whole Korean age look so quaint, there’s a whole new tier. Based on my time with the Dirty Bomb closed beta, I’m willing to bet that it will come to define that tier.