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MAME vs Gearsystem: catalog facts
MAME	Gearsystem
Free Free and open source under the GPL 2.0. No ROMs are included.	Free Free, with source code published on GitHub.
Windows, macOS, Linux	Windows, macOS, Linux
Covers thousands of arcade, console and computer systems in one program Accuracy is the stated priority, so behaviour matches the original hardware	Focus on accurate emulation Built-in debugger for developers
Accurate emulation of later hardware needs a genuinely fast machine ROM sets must match the exact version MAME expects, which frustrates newcomers	Covers only Sega 8-bit systems
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.