Mass Effect
I played the whole series in PC and fell for the games in my first second on the first game, This Game is a 3rd Person Shooter just like "Spec Ops: The Line" but also an RPG, with a lot of difficult choices. I'm currently at my fifth playthrough and I still find some parts painful, As the death of my companions and other Plot moments. The graphics in the first game were good at the time, but not really now, The second and third have amazing graphics, the gameplay is my favorite as you can do a lot of things, such as relations with Love Interests, Friends, Enemies. If you want to play it, I only say two things, first. Every choice you make affects the series, in the current game or in the next one, some have bigger consequences than others. And, Second, It's your Game so do whatever you like, but beware of the consequences.