Arma 3

Have you ever thought about what the real war is like? You can experience it first-hand by using this awesome simulation. Being one of the best games with a focus on a tactical realism Arma 3 can be played in the single-player mode, though you'll get the best out of it by playing multiplayer. After playing multiple arcade-like multiplayer games you'll get the immediate feel of how slow and dangerous armed fights in real life are. No wonder this game is used for military training. Enjoy the game playing with your friends and don't forget there're mods to alter the experience of the game.