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Gearboy 3.0.0


Gearboy is a cross-platform Game Boy / GameBoy Color emulator written in C++ that runs on iOS, Raspberry Pi, Mac, Windows, Linux and RetroArch.

Please, consider sponsoring (https://github.com/sponsors/drhelius) and following me on Twitter (http://twitter.com/drhelius) for updates.



  • Accurate CPU emulation, passes cpu_instrs.gb from blargg's tests.
  • Accurate instruction and memory timing, passes instr_timing.gb and mem_timing.gb from blargg's tests.
  • Memory Bank Controllers (MBC1, MBC2, MBC3 with RTC, MBC5), ROM + RAM and multicart cartridges.
  • Accurate LCD controller emulation. Background, window and sprites, with correct timings and priorities including mid-scanline timing.
  • Mix frames: Mimics the LCD ghosting effect seen in the original Game Boy.
  • Sound emulation using SDL Audio and Gb_Snd_Emu library.
  • Game Boy Color support.
  • Saves battery powered RAM cartridges to file.
  • Save states.
  • Compressed rom support (ZIP deflate).
  • Game Genie and GameShark cheat support.
  • Supported platforms: Windows, Linux, macOS, Raspberry Pi, iOS and RetroArch (libretro)


  • Windows, Linux and macOS:
    • Fully redesigned GUI using Dear ImGUI library (No more Qt 😅).
    • Fast Forward.
    • Game Genie and GameShark cheats support.
    • Predefined and custom palettes.
    • Screen ghosting.
    • Gamepad support.
    • Open Recent menu.
  • All platforms:
    • Performance improvements.
    • Bug fixes.







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