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Genesis Plus GX vs BlastEm: catalog facts
Genesis Plus GX	BlastEm
Free The open-source emulator is available without a license fee.	Free Free and open source under the GPL.
Windows, macOS, Linux	Windows, macOS, Linux
One core covers Mega Drive, Sega CD, Master System, Game Gear and SG-1000 Accurate sound emulation, including the Sega CD's PCM	Cycle accuracy that handles demos other emulators fail Fast enough for old hardware despite the accuracy
Usually run through RetroArch rather than as a standalone application	Small project with occasional releases Interface is minimal
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-3.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 22, 2026

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