The Mass Effect trilogy is available on console, and on PC.
I always set out to play each chapter twice, once as a renegade, and once as a paragon ... but the game is sooooo good at making me care about the impact of my choices it's hard not to change up my choices on occasion. For instance, I had a chance to literally shoot Mordin in the back in ME3, but couldn't pull the trigger. I love that wacky Salarian too much.
For someone who is more interested in the story, than the gameplay, I say just choose whatever dialogue choices you want, to hell with trying to max Renegade or Paragon points. There are only a few points in ME1 and ME2 where a lack of reputation really penalizes you. In ME3, there is virtually none of that.