Surprise recommendations! (gamers)

Hi! My boyfriend and I live together and he’s a big gamer. We have an extra room that he’s turned into his gaming room, with nothing except his set up. I really want to surprise him and make it his own with a cool ambience. Do you or your partners have any cool decor or essential items in your gaming room that i could add?? I’m not a gamer so I’m slightly clueless and i will still get stuff tailored to just him but if anyone has ideas too please comment 😊 He also plays on PC if that helps