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MAME vs FCEUX: catalog facts
MAME	FCEUX
Free Free and open source under the GPL 2.0. No ROMs are included.	Free Free and open source under the GPL.
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	Lua scripting and frame-precise movie recording for tool-assisted runs Debugger, hex editor and PPU viewers built in
Accurate emulation of later hardware needs a genuinely fast machine ROM sets must match the exact version MAME expects, which frustrates newcomers	Interface is dated and dense with developer tools NES and Famicom only
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License: GPL-2.0
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.