Gamers are extremely particular about their computer and console setups. They get only the best hardware, the best furniture, the best lighting solutions, and so on. To make the room even better, consider hanging cool gaming wall art.
It could be anything that inspires you to do better or express yourself as a gamer. You can get custom prints that have your name and your favorite console design on it. You could also find gaming-centric quotes for your walls.
Some people like posters of their favorite games that show the main characters. Others like artistic depictions of consoles from different generations. These could be done in different styles and color combinations.
If you like humor, then let it show in your wall décor. If you like retro games, then get prints inspired by those. It’s your room so make your own rules.