Of course these basic rules can be applied to most FPS which have split screen multiplayer. * If you die, drink * If you're killed by a headshot, take two drinks * If you use a killstreak reward, take a drink * If you insult or abuse another player (for example, say you slept with their mother, call them a "*@#!", teabag their corpse), take a drink * If you hear a character say oorah, or some derivative thereof, then take a drink. * Every time you sneak around and you stick close behind someone to stay undetected take a drink. Take a bonus drink if your face is in their ass while you're behind them.