You can also get him an Ally Z1 Xtreme. I have a steam deck and it’s amazing but as far as I know u do need to link up the steam when in setup. But the steam deck is definitely a bit more budget friendly in comparison.

Digimon cyber is amazing, hades is really good almost made for it actually, pokemon , lego games, the bind of isaac , both of the South Park games stick of truth and fractured. To name a few. All different genres but decent binges