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Head-to-head · Sega Master System Emulators

Dega vs Nexen

  • Updated Oct 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score Dega #5 in Sega Master System Emulators 8.4/10 Free plan Free plan✓ 1 of 5 features Visit Dega
Nexen #7 in Sega Master System Emulators 8.0/10 Open source ✓ 1 of 5 features Visit Nexen

Dega leads on 0 checks, Nexen on 0, and 3 are even. Who comes out ahead on the 3 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreDega · 8.4/10
  • Free planonly Dega

Dega scores higher on our rubric for sega master system emulators: 8.4 against 8.0 out of 10; our editors rank them #5 and #7.

Dega is the better fit for dedicated SMS users wanting scripting tools. Nexen is the better fit for TAS and multiplayer-focused desktop users.

  • Dega fits best

    Dedicated SMS users wanting scripting tools

  • Nexen fits best

    TAS and multiplayer-focused desktop users

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Side by side

Feature Dega 8.4/10 Visit ↗ Nexen 8.0/10 Visit ↗
At a glance
Editor score 8.4 8.0
Ranking #5 in Sega Master System Emulators #7 in Sega Master System Emulators
Best for Dedicated SMS users wanting scripting tools TAS and multiplayer-focused desktop users
Pricing model Free Free
Starting price Free plan Open source
Free plan ✓ (best) Not checked yet
Free trial — —
Deployment Desktop Desktop
Platforms Windows, Linux Windows, macOS, Linux
Built for Solo, Small business Solo, Small business
Features Dega 1/5 · Nexen 1/5
Source available ✓ (best) Not checked yet
Built-in debugger Not checked yet Not checked yet
Netplay support Not checked yet ✓ (best)
Cheat support Not checked yet Not checked yet
BIOS required Not checked yet Not checked yet
Specs
Supported platforms Windows, *NIX Not checked yet
Our review
Pros
  • Supports Master System, Mark III, and Game Gear software
  • Adds Python scripting with access to game RAM
  • Includes save states, movie tools, and frame controls
  • Rollback netplay supports multiplayer across Windows, macOS, and Linux.
  • Frame-by-frame TAS editing includes undo/redo and greenzone support.
  • Timestamped save states, debugger tools, shaders, and recording add depth.
Cons
  • Targets Windows and Unix-like desktop systems
  • Free use is limited to noncommercial purposes
  • Source-based distribution may require compilation
  • It is limited to Windows, macOS, and Linux desktop computers.
  • Its broad system coverage may exceed the needs of SMS-only users.
  • Several additional systems remain under development.
Our verdict

Dega is a desktop emulator for Sega Master System, Sega Mark III, and Game Gear software. It is aimed at dedicated users who want more than ROM loading, including save states, movie recording, memory tools, scripting, sound-chip support,…

Read the review →

Nexen is an open-source multi-system emulator for Windows, macOS, and Linux. It supports Sega Master System and Game Gear alongside NES, SNES, Game Boy, Game Boy Advance, PC Engine, WonderSwan, and Atari Lynx. That makes it a fit for…

Read the review →
  1. DegaSega Master System Emulators 8.4Free plan
  2. NexenSega Master System Emulators 8.0Open source

Strengths and trade-offs

  • Dega — where it wins

    • Supports Master System, Mark III, and Game Gear software
    • Adds Python scripting with access to game RAM
    • Includes save states, movie tools, and frame controls

    Where it doesn't

    • Targets Windows and Unix-like desktop systems
    • Free use is limited to noncommercial purposes
    • Source-based distribution may require compilation

  • Nexen — where it wins

    • Rollback netplay supports multiplayer across Windows, macOS, and Linux.
    • Frame-by-frame TAS editing includes undo/redo and greenzone support.
    • Timestamped save states, debugger tools, shaders, and recording add depth.

    Where it doesn't

    • It is limited to Windows, macOS, and Linux desktop computers.
    • Its broad system coverage may exceed the needs of SMS-only users.
    • Several additional systems remain under development.
  • Dega8.4/10 · Free plan

    A free, focused SMS emulator with scripting, movie tools, and memory features.

    Visit DegaFull verdict →
  • Nexen8.0/10 · Open source

    A strong desktop choice for Sega Master System TAS work and rollback multiplayer.

    Visit NexenFull verdict →

More comparisons

All sega master system emulators comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update