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Head-to-head · Sega Master System Emulators

Gearsystem vs MasterGear

  • Updated Oct 2026
  • Both researched from official sources
  • 6 checks side by side
Higher score Gearsystem #1 in Sega Master System Emulators 9.4/10 Free plan Free plan✓ 3 of 5 features Visit Gearsystem
MasterGear #2 in Sega Master System Emulators 9.0/10 Free plan Free plan✓ 3 of 5 features Visit MasterGear

Gearsystem leads on 1 check, MasterGear on 0, and 5 are even. Who comes out ahead on the 6 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreGearsystem · 9.4/10
  • Free planboth

Gearsystem scores higher on our rubric for sega master system emulators: 9.4 against 9.0 out of 10; our editors rank them #1 and #2.

Gearsystem offers source available; MasterGear doesn't.

Gearsystem is the better fit for most users wanting a full-featured SMS emulator. MasterGear is the better fit for users prioritizing mature SMS features and NetPlay.

  • Gearsystem fits best

    Most users wanting a full-featured SMS emulator

  • MasterGear fits best

    Users prioritizing mature SMS features and NetPlay

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Side by side

Feature Gearsystem 9.4/10 Visit ↗ MasterGear 9.0/10 Visit ↗
At a glance
Editor score 9.4 9.0
Ranking #1 in Sega Master System Emulators #2 in Sega Master System Emulators
Best for Most users wanting a full-featured SMS emulator Users prioritizing mature SMS features and NetPlay
Pricing model Free Free plan + paid
Starting price Free plan —
Free plan ✓ ✓
Free trial — —
Deployment Desktop, Mobile Desktop, Mobile
Platforms Web, Windows, macOS, Linux, iOS, Android Windows, Linux, Android
Support Community Email, Community, Docs
Built for Solo, Small business Solo, Small business
Features Gearsystem 3/5 · MasterGear 3/5
Source available ✓ (best) —
Built-in debugger ✓ ✓
Netplay support Not checked yet ✓ (best)
Cheat support ✓ ✓
BIOS required — —
Specs
Supported platforms Windows, macOS, Linux, BSD, RetroArch, Android, iOS, tvOS, webOS, Emscripten and other Libretro targets Windows, Linux, Android
Our review
Pros
  • Supports Master System, Mark III, Game Gear and SG-1000 software
  • Includes save states, rewind, cheats and a full debugger
  • Runs across desktop, mobile, web and Libretro-supported platforms
  • Supports Master System, Game Gear, SG1000, and related Sega systems
  • Includes built-in debugging, NetPlay, save states, and cheat tools
  • Offers configurable video options, FM sound, and serial EEPROM emulation
Cons
  • The full debugger may be more than casual players need
  • Gear-to-Gear communication is documented for local desktop processes
  • Network netplay is not part of the documented feature set
  • Android access is paid, while Windows and Linux versions are free
  • Does not include game ROMs
  • Not open source and has no AI features
Our verdict

Gearsystem is an open-source C++ emulator for Sega Master System, Sega Mark III, Game Gear, SG-1000 and Othello Multivision software. It is aimed at players who want more than basic ROM playback, as well as developers and enthusiasts who…

Read the review →

MasterGear is an emulator for Sega Master System software and a broad group of related 8-bit systems, including Game Gear, SG1000, SC3000, SF7000, Mark II, and Mark III. It is aimed at players and preservation-focused users who provide…

Read the review →
  1. GearsystemSega Master System Emulators 9.4Free plan
  2. MasterGearSega Master System Emulators 9.0Free plan

Strengths and trade-offs

  • Gearsystem — where it wins

    • Supports Master System, Mark III, Game Gear and SG-1000 software
    • Includes save states, rewind, cheats and a full debugger
    • Runs across desktop, mobile, web and Libretro-supported platforms

    Where it doesn't

    • The full debugger may be more than casual players need
    • Gear-to-Gear communication is documented for local desktop processes
    • Network netplay is not part of the documented feature set

  • MasterGear — where it wins

    • Supports Master System, Game Gear, SG1000, and related Sega systems
    • Includes built-in debugging, NetPlay, save states, and cheat tools
    • Offers configurable video options, FM sound, and serial EEPROM emulation

    Where it doesn't

    • Android access is paid, while Windows and Linux versions are free
    • Does not include game ROMs
    • Not open source and has no AI features

More comparisons

All sega master system emulators comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update