# TASEmulators/fceux

FCEUX, a NES Emulator

Repository: https://github.com/TASEmulators/fceux
Canonical: https://ross.abutalabs.com/products/fceux
Homepage: http://fceux.com
Language: C++
License: GPL-2.0
License Family: copyleft
Last push: 2026-05-30T00:35:58+00:00

## Health v2 (maintenance only)
Score: 66/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 84, release rhythm 24, longevity 100
- inputs: {"age_days": 3069, "days_push": 96, "days_rel": 296, "gap_med": null, "n_releases_24m": 1}
- flags: prerelease_only
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1548, forks 313 (observed 2026-08-28T04:05:01.901904+00:00)

## What it is
FCEUX is an open source NES emulator for Windows and Unix with solid emulation accuracy and advanced tools for power users. It is widely used for tool-assisted speedruns, ROM hacking, and debugging, and also serves casual gamers.

## Use cases
- play NES games on Windows, Linux, or macOS
- record tool-assisted speedruns of NES games
- hack and modify NES ROMs
- debug NES homebrew with memory viewers and breakpoints
- script gameplay automation with Lua
- use save states and rewind while playing

## When to choose
- you need TAS tools like frame advance, input recording, and Lua scripting
- you want built-in debugging, memory search, and PPU viewers for NES development
- you need a cross-platform NES emulator with a long track record

## When to avoid
- you want the highest-accuracy NES emulation and a modern UI — consider Mesen instead
- you need emulators for consoles other than the NES

## Facets
- artifact type: application
- maturity: active
- function: simulation
- domain: gaming-tools, entertainment
- platform: windows, cross-platform
- tags: nes-emulator, emulation, rom-hacking, tas, lua-scripting, debugger, save-states, linux, macos

## Member repositories
- TASEmulators/fceux (main) score 66

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:01.901904+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:30:25.273148+00:00, confidence not recorded.
  - readme: https://github.com/TASEmulators/fceux (fetched 2026-08-28T04:05:01.901904+00:00, sha eba92a8f6911)
  - homepage: http://fceux.com (fetched 2026-08-29T11:31:10.445939+00:00, sha 7733fb595208)
- Data as of 2026-08-30T08:39:29.467469+00:00.