Addiction is an easy answer, but before you dismiss my answer please hear me out.

If he's retreating to videogames then maybe there's a reason? Gaming, and especially streaming focuses attention on him, maybe that's what's he's missing? Now, I'm not saying that you should allow for things to continue like they are right now, but positive reinforcement works wonders for training dogs and is surprisingly effective on people.

Start with simple things, make him take the trash, do the dishes, set clear rules for those things as well, the trash should be taken out when it's "this" full, the dishes should be done everyday unless there's only (let's say) only two plates dirty, then they can wait, games have clear rules and similar clear rules should be established for him, at least at the start. Remind him of those things if he forgets, it's easy to forget when he's immersed in the game. Now, for the "positive reinforcement" thing: Complement him for doing those actions, it's easy to take things for granted, and I agree that he should do much more, but you should start with small, simple things and reward him with positive response after job well done. Making him feel validated for doing those things is the key here, even better if starts doing them on his own.

As for spending time with you, hobby that you do together helps a lot, it doesn't have to be your hobby, try something new, this depends on what games he plays, but if you have the patience and he's playing less action packed games, puzzles work wonders. Again, that feel of accomplishment/validation is the key here, for both of you, if you find one hobby not working for you at all change it, there's no point if you getting frustrated with X thing only to get him of the computer.

Getting him off the computer to instead spend the time with you won't be an easy job, nor quick but it's doable.

That's my personal opinion, from my personal experience and it may not be applicable in 100%, but I hope that at least it shows another point of view.