MGibster
Legend
I'm going to go with GURPS because it's the most realistic game (potentially) that I've got experience playing. It's on a sliding scale, you can certainly tweak the rules for a more cinematic experience, but if you want to crank up the realism it's certainly possible. One of the simplier ways they do this is by dividing skills into different categories based on how easy they are to learn. Firing a gun might be a physically easy skill whereas nuclear physics is a mentally hard skill meaning it's going to cost you more points to get that physics skill to the same level as the gun skill in most cases.