Pokemon Gaia - still worth a play?

patch it onto a clean FireRed 1.0 US rom, not 1.1 and not one that's already been patched with something else. the wrong base is behind most of the "freezes at the intro" posts you'll find. it's got megas and later gen mons in it too, so it feels less dated than its age suggests.

Yeah, it holds up. It's a finished game with its own region and story, not a reskinned Kanto. Just don't expect modern quality of life stuff, it plays like an older gen.