BlastEM

BlastEm is a Sega Genesis emulator for Windows, Linux and macOS. Its goal is to be extremely accurate while still running on very weak hardware, thanks to careful optimisation.

Its author does not yet consider its accuracy and performance finished, but it is more than good enough for most users. It passes many hardware tests and runs difficult games that many other emulators fail on.

BlastEm was originally developed on a netbook-class laptop from 2011, and it still runs Genesis games at full speed on that machine.

BlastEm already emulates the vast majority of the Genesis, though some hardware features are still missing. It is one of the most accurate Genesis emulators and one to keep an eye on.

Which download to pick

All five buttons are BlastEm 1.0.0, released in September 2026. Each is an archive with no installer: extract it to a folder of your choice and run blastem.

• for Windows (64-bit) suits almost any current Windows PC; for Windows (32-bit) is for old 32-bit systems.
• for macOS is for Macs.
• for Linux (64-bit) suits almost any current PC; for Linux (32-bit) is for old 32-bit systems.

BlastEm 1.0.0 is the first version that is not tied to x86 processors, and it adds Sega CD, 32X, Game Gear, SG-1000 and Sega Pico support. The previous release, 0.6.2 from March 2019, covers the Genesis with only limited Master System support; its builds for Windows, macOS and Linux are in the download archive.

Getting started

Start BlastEm without a game to reach its menu, then load a Genesis ROM from there. Esc opens the menu during play.

Default keyboard controls, as documented for 0.6.2:

• Arrow keys for the D-pad, Enter for Start
• A, S and D for the A, B and C buttons; Q, W and E for X, Y and Z
• F11 toggles full screen and Tab is a soft reset

Xbox and PlayStation-style gamepads are recognised, and controls can be changed from the menu. Settings are saved to blastem.cfg in %localappdata%\blastem on Windows or ~/.config/blastem on Linux. Genesis cartridge games need no BIOS.