Gamenerds all over the world wear them, gameshirts!
Some online shops ask way to much money for their gameclothes so making them yourself is probably the cheapest way to get some original shirts. At Shuanfu’s Dojo NES-freaks make gameshirts all day long with simple materials. It looks like you need to be a good drawer to make them though, but it’s really cool to tell your fellow geeks that you make your own clothes.