What are some lower size games that work well on linux handhelds?

Running games off my microsd has a lot of issues and only works rarely (legion go s, not sure if its the reader or card, heard it's just slow in ge…

Realized you can significantlly compress ps2 roms using emu decks compression tool, and have saved quite a bit of space doing that, shrunk the size of each rom by more than half
I have seen up to 80% file size reduction in some cases compressing to CHD format with chdman. Most of the time its about a 50% reduction, in some cases a little less like Metal Gear Solid 3. Is there a better format?
It just runs a script to compress all your games to chd or whatever is appropriate.