One of the most immersion-breaking things about video games compared to movies and TV shows is the fact that friendly NPCs rarely react to your input as player outside pre-programmed interactions. For example, aiming a shotgun at your non-player companion (as one does) and watching them maintain composure and appear perfectly calm, creeping you out a little. Well, it sounds like Call of Duty: Modern Warfare 3 will change that with its recently revealed “open combat missions.” Sledgehammer Games has now revealed that NPCs will react differently depending how you approach these new missions.