For games where decisions really matter (ie you get multiple endings based on good/bad choices), I usually do two play throughs (if the game is good). One moral

For games where decisions really matter (ie you get multiple endings based on good/bad choices), I usually do two play throughs (if the game is good). One morally good and one morally extremely evil. I try to RP them, as in, I avoid thinking about what I, the real person, would do but instead focus on what the character would do. I think it adds a layer of fun to the game that isn't even really in the game.