You gain an emotional connection to the characters, which pays off in spades during the game's climax. Everything comes to a head when you and your team finally take the fight to the aliens. The encounter is a doozy, one that can whittle your crew down to nothing. Few game finales feel this big, this portentous. And that's all due to how deeply the game involves you in its branching, twisting story. In Mass Effect 2, you're not just pulling the trigger, you're spinning the yarn.