When it was released back in 2011, it was rough around the edges with lots of bugs, but now in 2014, with continuous support from the devs, virtually all the problems have been ironed out, and it now runs very stable. Don't bother with the single-player though, its rubbish and the AI is dumb. This is probably the only game that really models suppression. There are some neat gameplay mechanics that simulate suppression, and reward teamwork and discourage camper score-whoring. Weapon handling (accuracy etc) are still the best I have ever seen in any game (much better than ARMA series in my opinion). Weapons sound very realistic, whether near, far, or inside a building.
This is because this game has the best multiplayer if you want the ultimate realistic hardcore FPS experience. I have played this game longer than any other.
