Nexen review
A desktop emulator built for TAS creators, netplay, debugging, and recording.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Nexen is an open-source multi-system emulator for Windows, macOS, and Linux. It fully supports NES, SNES, Game Boy, Game Boy Advance, Sega Master System/Game Gear, PC Engine, WonderSwan, and Atari Lynx. The product is aimed at players and creators who want more than basic game playback, particularly TAS creators, emulator power users, and people who need recording, debugging, or multiplayer tools in the same desktop application.
Its strongest area is the depth of its timing and creation features. Rollback netplay supports multiplayer, while unlimited timestamped save states can be browsed visually. The frame-by-frame TAS editor includes undo/redo and greenzone support, and movie recording and playback handle multiple format imports and exports. A debugger adds disassembly, memory viewing, breakpoints, tracing, and profiling. These features make Nexen a focused choice for precise play, tool-assisted work, and technical analysis rather than a minimal emulator interface.
Visual and capture options round out the package. Shader, filter, integer-scaling, and aspect-ratio controls provide flexibility for displaying retro systems, while audio and video recording support content creation. Nexen is distributed through downloadable desktop binaries and source code through GitHub, with additional systems under development. Choose it if your priority is broad retro-system coverage paired with TAS, netplay, debugging, and recording capabilities. Casual players seeking only straightforward emulation may find its specialized toolkit unnecessary, and users looking for mobile or web platform coverage should choose an alternative.
Nexen pros and cons
- Where it wins
- Supports eight retro systems across Windows, macOS, and Linux
- Adds rollback netplay, unlimited visual save states, and TAS tools
- Includes debugging, recording, shaders, filters, and scaling controls
- Where it doesn't
- Platform coverage is limited to desktop operating systems
- Sega Genesis, Atari 2600, and Fairchild Channel F are still in progress
- Its extensive tooling may be more than casual players need
Nexen fact sheet, pricing and score →
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