Mednafen
Mednafen is a free, portable emulator for several classic computer and console systems, controlled from the command line and built around OpenGL and SDL.
What Mednafen is
Mednafen is a free, portable emulator for several classic computer and console systems, controlled from the command line and built around OpenGL and SDL. Its supported systems include Apple II, Atari Lynx, Game Boy, Game Boy Advance, NES, SNES, Sega Saturn, and Sony PlayStation. It offers save states, real-time rewinding, PNG snapshots, QuickTime movie recording, and WAV sound logging. Hotkeys and virtual system inputs can be assigned to a keyboard, joystick, or both. It runs on Linux and Windows; Windows builds require Windows XP or newer, with 64-bit recommended. Non-CD games can be loaded from gzip, Zstandard, or ZIP files. CD games use dumped disc images, though ZIP loading is available when CD image memory caching is enabled; physical CD support was removed in version 0.9.38. Network play requires a separate dedicated server program. Mednafen is distributed under the GNU GPLv2. Its documentation warns that specially constructed save states may cause serious problems, including possible execution of host code, so avoid states from untrusted parties.
Good
- Supports a range of listed computer and console systems.
- Offers save states and real-time rewinding.
- Maps inputs to keyboard, joystick, or both.
- Can record movies and log WAV audio.
- Free and distributed under the GNU GPLv2.
Watch out
- Uses a command-line interface.
- Physical CD support was removed in version 0.9.38.
- Network play needs an external dedicated server.
- Untrusted save states may pose a security risk.
Who it suits
Mednafen suits users who want a free emulator covering multiple listed systems and are comfortable with a command-line interface. It may also suit players who want save states, rewinding, capture tools, or network play through a separate server.
Verdict
Mednafen combines broad system support with useful session and capture tools, but its command-line approach may not suit everyone. CD play relies on dumped images, and save states from untrusted parties should be avoided.
The facts
Each one read from Mednafen's own pages, with the date it was checked.
What it does
- Audio format limitation
- MP3 is not supported for audio files referenced by CUE sheets.checked 2 Oct 2026
- CD limitation
- Physical CD support was removed in version 0.9.38; CD-ROM games are loaded from dumped disc images.checked 2 Oct 2026
- CD support
- Mednafen loads CD-ROM games from disc images, and physical CD support was removed in version 0.9.38.checked 3 Oct 2026
- Controls
- It supports remapping hotkeys and virtual system inputs to a keyboard, joystick, or both.checked 3 Oct 2026
- Downloads
- The releases page lists 32-bit and 64-bit Windows builds and source code; it says Windows XP or newer is required for Windows builds.checked 3 Oct 2026
- Features
- Core features include save states, real-time rewinding, PNG snapshots, QuickTime movie recording, and WAV sound logging.checked 3 Oct 2026
- File formats
- It can load non-CD games from gzip or Zstandard files and ZIP archives; CD games can load from ZIP archives when CD image memory caching is enabled.checked 3 Oct 2026
- File safety
- CUE, TOC, and PSF files can reference arbitrary files, and the documentation says the default-enabled filesys.untrusted_fip_check setting mitigates a potential information-leak issue.checked 2 Oct 2026
- Game file formats
- It can load non-CD games from gzip and Zstandard files or ZIP archives, and CD games from ZIP archives when CD image memory caching is enabled.checked 2 Oct 2026
- License
- Mednafen is distributed under the GNU GPLv2.checked 3 Oct 2026
- Network play
- Network play is supported through an external dedicated server program.checked 3 Oct 2026
- Product
- Mednafen is a portable, OpenGL- and SDL-based, command-line multi-system emulator.checked 3 Oct 2026
- Purpose
- Mednafen is a portable, command-line-driven multi-system emulator that uses OpenGL and SDL.checked 2 Oct 2026
- Save and capture features
- It supports save states, real-time rewinding, PNG screen snapshots, QuickTime movie recording, and WAV sound logging.checked 2 Oct 2026
- Security
- The documentation warns that specially constructed save states can lock up or abort the emulator, consume substantial CPU, and potentially execute host code.checked 3 Oct 2026
- Security guidance
- The documentation warns that specially constructed save states may cause a lockup, consume substantial CPU, or potentially execute arbitrary host code, and advises against loading states from untrusted parties.checked 2 Oct 2026
- Security setting
- The filesys.untrusted_fip_check setting is enabled by default to mitigate a potential information-leak issue involving included files.checked 3 Oct 2026
- Support
- The official site links to a Mednafen forum and an FAQ.checked 2 Oct 2026
- Supported build systems
- The releases page lists successful compilation on FreeBSD, Linux, NetBSD, OpenBSD, and Windows.checked 2 Oct 2026
- Supported systems
- Its listed systems include Apple II, Atari Lynx, Game Boy, Game Boy Advance, NES, SNES, Sega Saturn, and Sony PlayStation.checked 2 Oct 2026
- Systems
- It supports systems including Apple II, Atari Lynx, Game Boy, NES, SNES, Sega Saturn, and Sony PlayStation.checked 3 Oct 2026
Where it runs
- Build platforms
- The releases page says Mednafen has been successfully compiled on FreeBSD, Linux, NetBSD, OpenBSD, and Windows.checked 3 Oct 2026
- Windows requirements
- The releases page says Windows builds require Windows XP or newer and recommends the 64-bit build for better performance and functionality.checked 2 Oct 2026
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