The Oklahoma Video Game Exhibition is the only event like it - not only in Oklahoma, but the entire Midwest.
It was held over the weekend at the Tulsa Spirit Bank event center.
You could find classic games from the 70s and 80s...to play or buy.
The organizer started the event ten years ago, after attending a much larger version in Las Vegas.
Jesse Hardesty, Event Organizer: "I personally do it because it's a lot of fun. I like to provide the entertainment for the public. It's a great family friendly thing to do for the day. And honestly we don't make a profit doing it. We just have a lot of fun."
Some of the money that is raised, will go to help the Autism Center of Tulsa.