I spent 1224 hours in this game so if you never played it yet after it came out many years ago. buy it on xbox live or go and get Steam and play it, it's a fun F2P game and it's not a broken game where one type is op ok maybe because of classes. This game is really hard to give since 80% of people at least heard it.
The story goes Red vs blue which is a never ending battle there is also mann up mod in which blue sends a bunch of robots after red's bomb hole that a team of humans have to defend