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Genesis Plus GX
What it is
Genesis Plus GX is a free emulator for Sega 8-bit and 16-bit systems, including SG-1000, Mark-III, Master System, Game Gear, Genesis/Mega Drive, and Sega/Mega CD. It includes backward-compatibility modes and lists accurate CPU and video emulation, sample-accurate sound, and cycle-accurate CPU and sound synchronization. It reads raw and interleaved ROMs, plus CUE+BIN, ISO+WAV, and ISO+OGG CD images. Emulated peripherals include 2-, 3-, and 6-button pads, multitaps, the Sega Mouse, and light guns; it also handles cartridge hardware such as SVP DSP, EEPROMs, and Game Genie. Features include save states, shaders, netplay, and cheat support. Standalone builds are available for GameCube and Wii, with frontend access through RetroArch, BizHawk, and OpenEmu. Compatibility is described for released software, though the project notes it cannot test every game from start to finish and some Master System games need specific hardware or modes. The multi-platform core source has a non-commercial license.
For and against
For
- Supports several Sega 8-bit and 16-bit systems.
- Reads ROMs and multiple CD image formats.
- Includes save states, shaders, netplay, and cheat support.
- Wii version supports up to eight players.
Against
- Multi-platform core source is non-commercial.
- PICO emulation is preliminary.
- Some Master System games require specific hardware or modes.
The verdict
Genesis Plus GX covers a broad Sega system range and lists several emulation and gameplay features. Check its platform and license limits, and note that compatibility is not tested for every game.
Who it suits
It suits people looking to run Sega system software on supported builds or through compatible frontends. The Wii version also supports up to eight players and several Wii controllers.
Plans and prices
Genesis Plus GX
source code under specific non-commercial license · standalone GameCube/Wii build
Read 29 Sep 2026 · github.com
On the record
- Accuracy
- Its feature list describes highly accurate CPU and video emulation, sample-accurate sound-chip emulation, and cycle-accurate CPU and sound synchronization.github.com · read 29 Sep 2026
- Builds
- The repository provides standalone GameCube and Wii DOL builds and a Win32 libretro core DLL.github.com · read 28 Sep 2026
- Cartridge hardware
- The emulator supports extra cartridge hardware including the SVP DSP, J-Cart, backup RAM, EEPROMs, mappers, Game Genie, and Action Replay.github.com · read 29 Sep 2026
- Compatibility
- The project describes compatibility with released software for SG-1000, Master System, Game Gear, Genesis/Mega Drive, and Sega/Mega CD, while noting that it cannot test every game from start to finish.github.com · read 29 Sep 2026
- Compatibility claim
- The project describes its emulation as having 100% compatibility with released software for the listed Sega systems, including known unlicensed or pirate dumps.github.com · read 28 Sep 2026
- Downloads
- The repository links to the latest official standalone GameCube/Wii port and compiled GameCube/Wii and RetroArch builds, with the latter noted as Windows 32-bit only.github.com · read 29 Sep 2026
- Emulated systems
- It emulates SG-1000, Mark-III, Master System, Game Gear, Genesis/Mega Drive, and Sega/Mega CD hardware, including backwards compatibility modes.github.com · read 28 Sep 2026
- Frontend integrations
- The project says it is available through frontends including RetroArch (libretro), BizHawk, and OpenEmu.github.com · read 29 Sep 2026
- Frontends
- The project lists RetroArch (libretro), BizHawk, and OpenEmu as frontends through which it is available on other platforms.github.com · read 28 Sep 2026
- GameCube/Wii build
- The standalone GameCube/Wii port includes SD/SDHC and DVD loading, zipped ROM support, save-state handling, and configurable video and audio options.github.com · read 29 Sep 2026
- Getting started
- The maker’s guide says GameCube and Wii applications are distributed as DOL files and describes launching the Wii version through the Homebrew Channel.github.com · read 28 Sep 2026
- Known limits
- Some Master System games require particular hardware or VDP modes and are listed as incompatible with certain systems or modes.github.com · read 29 Sep 2026
- License
- The repository license says redistribution may not be sold or used in a commercial product or activity, and modified-source redistributions must include the complete source code subject to stated conditions.github.com · read 29 Sep 2026
- License restriction
- The multi-platform core source code is provided under a specific non-commercial license.github.com · read 28 Sep 2026
- Media formats
- It supports raw and interleaved ROM files, several Sega/Mega CD image formats, and external SUB subcode files.github.com · read 29 Sep 2026
- Notable limit
- The features page lists PICO emulation as preliminary and caps Backup RAM at 64 KB and Sega/Mega CD RAM carts at 512 KB.github.com · read 28 Sep 2026
- Peripherals
- Supported peripherals include 2-, 3-, and 6-button pads, multitaps, Sega Mouse, light guns, and other console accessories.github.com · read 29 Sep 2026
- Product
- Genesis Plus GX is an open-source Sega 8/16-bit emulator focused on accuracy and portability.github.com · read 29 Sep 2026
