First and foremost is the matter of where the mind is. If God isn't the first thing one is seeking, then whatever obstruction is in the way needs to be cleared out.
Now, my view on this matter, as an avid gamer, is that video games provide a means to vicariously do things you could or would not do in reality. Violence in video games is fine; violence in reality is terrible.
I loved the Gears of War series. An alien race tries to destroy mankind, and only a few veteran soldiers are left to fight off hordes of the Locust race. This doesn't mean I'd destroy an aggressive alien with a chainsaw in reality; this means that, while playing as Marcus Fenix, I do what needs to be done to survive and protect humanity.
Next, about magic. I write fantasy pieces, so I've got my views on the subject. I don't like games or works that represent real magic, things like necromancy or invoking demonic power. What I perceive as acceptable magic is this: A force of physics not understood scientifically by the inhabitants of a fictional world, which is thus known as magic. This magic energy greatly enhances the sheer variety of possible events in a story, from things like the vial of healing fluid in the Chronicles of Narnia, to the amazing game Legend of the Dragoons, in which you simply can't defeat the escaped Grand Dragon without magic artifacts designed to weaken it.