Intelligent Qube is an early PS1 game where you play as a little guy blowing up cubes with the right timing to clear out other cubes. One of my favorites, simple to play but addictive and hard to master, the look is extremely cool, and the music is incredible and not what you'd expect at all. Just an insanely good use of the Playstation and plays great on the RG35XX.

The RG35XX is in a real sweet spot, I think. What made me pick it is that I was specifically looking to play game boy games, and it's a really cool bonus that it plays PS1 games. It's cheaper than other options, and powerful enough to play through that entire library. The big competitor is the Miyoo Mini Plus that's coming out soon, but it's going to be harder to get and it's a little less powerful. Both of these handhelds have a cool community that offers things like custom software and hardware mods which is cool.

Another cool option is the ANBERNIC RG353M, which has joysticks for the ps1 games that use them and can play Dreamcast games, but that's twice the price of the RG35XX. I'd consider it if it played up to PS2 and Gamecube games but it doesn't.

Retro Game Corps has a great video covering other options, but in general if you want to emulate more than a PS1 you're gonna start getting less convenient, more expensive devices if you want to play all the games you'd want to, until you eventually just get to a Steam Deck. And like a Steam Deck is really cool but I don't need that to play Chono Trigger Lol