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MAME vs Genesis Plus GX: catalog facts
MAME	Genesis Plus GX
Free Free and open source under the GPL 2.0. No ROMs are included.	Free The open-source emulator is available without a license fee.
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	One core covers Mega Drive, Sega CD, Master System, Game Gear and SG-1000 Accurate sound emulation, including the Sega CD's PCM
Accurate emulation of later hardware needs a genuinely fast machine ROM sets must match the exact version MAME expects, which frustrates newcomers	Usually run through RetroArch rather than as a standalone application
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License not stated
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 22, 2026

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