IIGS games/graphics compare to early PC games with 16 colors... Like a Tandy 1000.. Or low resolution EGA modes. Somewhere in between a Commodore 64 and Amiga 500.
If you're a Apple IIe fan it's a nice machine... Else it was way over priced compared to any Tandy 1000. Some common games for PC were ported for it but that's about it..