Gearsystem cydia tweak is an Sega Master Sytem / Game Gear emulator!
The emulator automatically saves your progress every time you change games and when you quit, no action needed.
This is an emulator and requires ROM images but NO ROMs are
included. You can download ROMs directly from Safari to Gearsystem. Do not contact the author for ROM files.
Roms can also be placed in /var/mobile/media/ROMs/Gearsystem , making sure the folder has read/write permission. This is the folder where save files are created.
It supports both uncompressed and zip compressed roms.