The worst thing about video games is how time consuming they are and how little value they provide for that time, relative to other things you could be doing. Some video games might teach you some things about history or tell an insightful story, but you can get that much more from books and movies (in less time). They might improve hand-eye coordination and strategic thinking in some ways. Take it up with a good spiritual director. Guard your time and use it wisely. There are almost always better ways to spend it.