I personally think smaller scale 2000s collect-a-thon games like Ty the Tasmanian Tiger hold up pretty well. Never knew it existed until maybe a year or two ago and I gotta say, it’s pretty good and runs real smooth on Dolphin on my Steam Deck ( and coincidentally better than the legitimate PS2 copy I have ).

I personally also think the PS2 Star Wars Battlefront games still hold up well enough. Love the lack of monetization and lack of online play because I hate competitive play as a more casual player.

Those games are definitely pass my recommendation checklist due to the amount/quality of content, and/or replayability level.

Another couple games that pass that checklist would be Final Fantasy X ( I never finished it, but had been enjoying it all the way ) and Sly Cooper 1 ( due to the time trials for each non-boss level adding a good amount of challenge and length ).