I don't mess with most of them. But that's just my personal taste, not a command I am quoting from God in His word.
There is a lot to be said about the power of what we surround ourselves with. If I see the game as being a challenge of, perhaps beating the computer and increasing my mental reflexes, etc, and I'm not addicted to it, I don't think there is a problem. BUT, if the attraction is the desire to fantasize about murder, theft, or whatever other bad things are portrayed, I think that is a problem. And for many people, this is exactly the attraction. But the problem is not the video game. But the problem is more in the mental and spiritual state of the person that likes fantasizing about these bad things than it is in the game itself.