As anyone who bothered to play or research Mass Effect knows, you're free to make decisions that directly affect the plot, the characters and even the ultimate outcome of the game. Most of us try to stay on the nice-to-neutral side of the law, generally helping people out while occasionally dipping into the renegade pool when a particularly devious choice presents itself. But what if you play the entire game as a rootin' tootin' jerkhole that kills anyone in his way and berates everyone else? Hilarity, that's what.
Commander Shepard is supposed to save the galaxy, but as this video proves, he can be a real dick.