What should I get him for his birthday?

So I’ve been seeing someone for nearly a year now, and his birthday is this thursday. I’ve been contemplating what to get him for like the last two months but I still haven’t decided. He mainly likes rap, and classic nintendo games (super mario bros, mario kart, etc,). Outside of those things can you guys give me some ideas of what I should get him?? ((He’s turning 22, I’m 20 so I can’t buy him alcohol LOL))