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GnGeo

Free#7 of 18 in Neo Geo Emulators

GnGeo: A focused, open-source Linux emulator with save states and configurable controls. Ranked #7 of 18 in Neo Geo Emulators by our editors (7.8/10); pricing: Open source; best for linux users who need save states.

7.8/10★★★★☆Editor score

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At a glance

• Editor score
  7.8 / 10
• Pricing
  Open source
• Best for
  Linux users who need save states
• Paid from
  Free
• AES emulation
  Yes
• Facts checked
  21 Sep 2026

• Where it wins

  • Save states support pausing and resuming NeoGeo games.
  • Configurable controls include joysticks and per-player mapping.
  • Supports AES emulation, scaling, sound, and multiple CPU cores.

• Where it doesn't

  • Linux is the only verified supported platform.
  • Compiling from source requires technical setup effort.
  • A NeoGeo BIOS and legally obtained game files are required.

Our verdict on GnGeo

GnGeo is a free, open-source NeoGeo emulator distributed as a source-code project. It is aimed at technically oriented Linux users who want to run NeoGeo ROM sets with control, display, audio, and system-mode configuration. Its feature set covers NeoGeo ROM emulation, command-line ROM and BIOS path configuration, fullscreen display, resolution scaling, joystick input, per-player controls, sound, configurable sample rate, country selection, and home, arcade, and UniBIOS modes. Save-state support makes it especially suitable for players who want to pause progress and resume later.

The standout strength is control over emulation behavior. GnGeo offers multiple 68k and Z80 CPU-core options, along with selectable country and system modes, giving technically minded users more configuration scope than a minimal ROM launcher. Save states add a practical benefit, while fullscreen output and resolution scaling address different display preferences. The command-line design keeps configuration explicit, but it also means the product is better suited to users comfortable with terminals, file paths, and emulator settings than to people seeking a guided desktop setup.

GnGeo has a narrow platform and ecosystem focus. Linux is the verified supported platform, and the project is distributed under GPLv2 with additional component licensing notes. Setup includes compiling source code and supplying a required NeoGeo BIOS alongside legally obtained game files, so it fits users who already understand emulator file management and licensing responsibilities. Choose GnGeo for free AES-capable emulation, save states, and detailed configuration on Linux. Users who prioritize a packaged application, a graphical onboarding flow, or broader verified platform coverage should consider an alternative.

Your product? Our editors can test GnGeo in depth and publish a review, labelled as paid · from $149/mo →

GnGeo pricing

GnGeo fact sheet

Alternatives to GnGeo

• GGeolithA broad desktop emulator for Neo Geo cartridges, arcade software, and discs.9.4
• NENEO.emuA paid, open-source emulator with broad Neo Geo support and flexible controls.9.0
• NeoRAGExA portable, feature-rich choice for free Neo Geo AES and MVS emulation on Windows.8.8

See all GnGeo alternatives →

GnGeo vs the competition

• GGGnGeo vs Geolith
• GNEGnGeo vs NEO.emu
• GGnGeo vs NeoRAGEx
• GGGnGeo vs GxGeo
• GMGnGeo vs MVSPSP
• GNGnGeo vs NeoDS

Compare GnGeo with any tool side by side →

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The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used GnGeo for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.

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Featured on iTechGuides

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update