Reprogrammable 4 Megabit cartridge circuit for Game Gear

For making dedicated cartridge versions of your homebrew games!

  •  This circuit
  •  Fits inside standard cartridge shells (not included)
  •  Programming (programmer and adapter not included)
  •  Example use (homebrew game)
  •  Example use (homebrew game)


This is reprogrammable Game Gear cartridge circuit, perfect for easily making physical versions of your homebrew games! Can be installed in standard Game Gear cartridge shells.

  • Re-writeable 4Megabit (512 kB) flash chip
  • Compatible with systems from all regions
  • Partial Sega-style mapper (slot 2 only)[1]
  • Fits in standard game cartridge shells
  • Tested and pre-programmed with the homebrew game DONKEY.GG
    (for demonstration purposes)

This design has no battery-backed RAM on-board, but with the right programming techniques, scores and progress can be saved directly on flash. The pre-programmed game, DONKEY.GG, does that!

[1] We can develop a custom mapper if necessary for your game or project.


Buy here

Out of stock

DescriptionReprogrammable 4 Megabit GG cartridge circuit
1$26.25 Each
2...9$23.62 Each (10% OFF)
10+$21.00 Each (20% OFF)

We normally ship within 5 days (excluding week-ends and holidays) after payment.
Prices are in US dollars and are subject to change without notice.

Related products

Product photo

USB-connected programmer/reader for SMS 44 and 50 pin and cartridges. Also supports Game Gear and games cards through adapters.

Starting from $48.00

Product photo

To read/write Game Gear cartridges using an SMS cartridge reader/programmer. You need to provide and solder your own Game Gear slot.


Product photo

For making dedicated cartridge versions of your homebrew games!


(Volume pricing available)