The current trouble's relatively recent, but the roots of it go back a bit. Our teams didn't have much to do with each other at first; it wasn't that we didn't like each other, we just didn't know each other. Then a Judge called Game Master showed up.
His game...well, it was probably the worst we've ever had. He divided us up and gave us a list of actions to inflict on other teams each round of the game. We had to "play" at least one, and no more than three, all on different teams; a few other rules came later. Some of the actions were relatively harmless, like "punch someone in the face" or "steal a ration of jerky." Some of them...well, the one with the highest value was "slow kill", followed by "fast kill" and "remove a limb". Each card gave you points, taken from the other team, and if you had a debt by the end of the game, Game Master claimed he'd give you to one of his compatriots.