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Dega

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What Dega is

Dega is an emulator for Sega Master System, Mark III, and Game Gear games. It runs on Windows and *NIX systems; its README names Windows 95, NT, 98, 2000, ME, and XP. The software may be used freely only for non-commercial purposes, and the GitHub repository currently has no releases. Dega supports Python scripting for user input, resets, movie playback and recording, and access to a running game's RAM. Python can work as a module in another Python program or in embedded mode within the emulator. The distribution includes memory.py, a Python memory viewer and trainer. Users can record a movie and resume recording later from a saved state. Windows has save-state slots, and Dega also uses a native gzip-compressed .dgz format. It can load ROMs from ZIP files, enable Yamaha 2413 FM audio on machines equipped with that chip, and combine certain games' flickering-glasses effect into a red-and-blue image for red/blue glasses. Technical information estimates compatibility at 97%.

Who it suits

Dega may suit people looking to play Sega Master System, Mark III, or Game Gear games on Windows or *NIX. Its Python scripting and memory tools may also interest users who want to inspect or script game behavior.

What it does well

Emulates three Sega console formats
Supports Python scripting and RAM access
Can resume movie recording from a saved state
Loads ROMs from ZIP files
Technical information estimates 97% compatibility

What to know first

Use is restricted to non-commercial purposes
The repository currently has no releases
README names older Windows versions

Limits

Dega is free only for non-commercial use. The repository currently has no releases.

Plans

Plan	Billed and limits	Price
Dega	free for non-commercial use only	Free

As github.com lists them, read 30 Sept 2026. The maker's own page has the final word.

Getting started

Open the Dega GitHub repository.
Use a Windows or *NIX system.
Load a game ROM, including from a ZIP file if needed.

Verdict

Dega combines emulation for three Sega systems with Python scripting, memory tools, and movie recording. Check the non-commercial restriction and the lack of repository releases before choosing it.

Questions

Which systems does Dega emulate?

Dega emulates Sega Master System, Mark III, and Game Gear games.

Which operating systems are supported?

Dega runs on Windows and *NIX. The README specifically names Windows 95, NT, 98, 2000, ME, and XP.

Is Dega free for commercial use?

No. It may be used freely only when it is not used commercially. The listed plan is free.

Does Dega support Python scripting?

Yes. Python scripting covers user input, resets, movie playback and recording, and access to the running game's RAM. It can run as a module in another Python program or embedded inside the emulator.

Can Dega save states and record movies?

Yes. Windows builds have save-state slots, and Dega supports a gzip-compressed .dgz format. Movie recording can be resumed later from a saved state.

Are Dega releases available on GitHub?

The GitHub repository currently has no releases.

Facts from Dega's own pages

3D display: Dega can merge the flickering glasses effect from some games into a red/blue image for red/blue glasses. · raw.githubusercontent.com, 30 Sept 2026
Commercial restriction: The software may be used freely as long as it is not used commercially. · raw.githubusercontent.com, 30 Sept 2026
Compatibility: The technical information estimates 97% compatibility. · raw.githubusercontent.com, 30 Sept 2026
FM audio: Dega can enable the Yamaha 2413 FM sound chip for machines equipped with it. · raw.githubusercontent.com, 30 Sept 2026
Memory tools: The distribution includes memory.py, a memory viewer and trainer fully implemented in Python. · raw.githubusercontent.com, 30 Sept 2026
Movie recording: Dega allows users to record a movie and resume recording it later from a saved state. · raw.githubusercontent.com, 30 Sept 2026
Operating systems: The README says Dega runs under Windows 95, NT, 98, 2000, ME or XP and *NIX. · raw.githubusercontent.com, 30 Sept 2026
Python modes: Python support works in standalone mode as a module in a Python program or embedded mode inside the emulator. · raw.githubusercontent.com, 30 Sept 2026
Python scripting: Dega supports Python scripting of user input, resets, movie playback and recording, and access to the running game's RAM. · raw.githubusercontent.com, 30 Sept 2026
Release availability: The GitHub repository currently has no releases. · github.com, 30 Sept 2026
ROM loading: Dega supports loading ROMs from ZIP files. · raw.githubusercontent.com, 30 Sept 2026
Save states: Dega provides save-state slots on Windows and supports a native gzip-compressed .dgz save-state format. · raw.githubusercontent.com, 30 Sept 2026
Video encoding: Dega supports AVI encoding from a movie file on *NIX systems. · raw.githubusercontent.com, 30 Sept 2026
What it does: Dega is an emulator for Sega Master System, Mark III and Game Gear games. · raw.githubusercontent.com, 30 Sept 2026

Where Dega stands on Freedom251

Sega Master System Emulators#6 of 25
Game Gear Emulators#10 of 31