# FNA-XNA/FNA

FNA - Accuracy-focused XNA4 reimplementation for open platforms

Repository: https://github.com/FNA-XNA/FNA
Canonical: https://ross.abutalabs.com/products/fna
Homepage: https://fna-xna.github.io/
Language: C#
License Family: other
Topics: xna, fna, csharp, gamedev, windows, macos, linux, steamos
Last push: 2026-08-24T20:56:28+00:00

## Health v2 (maintenance only)
Score: 98/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 95, longevity 100
- inputs: {"age_days": 3908, "days_push": 9, "days_rel": 32, "gap_med": 30.0, "n_releases_24m": 23}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3035, forks 329 (observed 2026-08-28T04:07:39.093667+00:00)

## What it is
FNA is an accuracy-focused reimplementation of the Microsoft XNA Game Studio 4.0 Refresh libraries for open desktop platforms. It lets XNA games run on Windows, Linux, and macOS with a single assembly, and is widely used for porting XNA titles to Steam and consoles.

## Use cases
- port an XNA 4 game to Linux and macOS
- run XNA games on Steam Deck / SteamOS
- develop a new C# game using the XNA API
- preserve legacy XNA games without Microsoft tooling
- build a game that works on Windows and Linux from one assembly
- port an XNA game to consoles like Switch or Xbox

## When to choose
- you have an existing XNA 4 codebase you want to run on modern open platforms
- you want maximum API accuracy with the original Microsoft XNA behavior
- you need a single assembly that works across Windows, Linux, and macOS
- you want a fully open-source, FOSS game runtime

## When to avoid
- you are starting a brand-new game and prefer a modern framework like MonoGame's newer features or Unity/Godot
- you need mobile or web targets as your primary platform
- you want a full engine with editor tooling rather than a runtime library
- you need XNA versions other than 4.0 Refresh

## Facets
- artifact type: library
- maturity: active
- function: game-engine, graphics, audio-processing, sdk
- domain: cross-platform, graphics
- platform: windows, cross-platform, cpp
- tags: xna, csharp, gamedev, reimplementation, game-porting, steamos, game-development, linux, macos

## Member repositories
- FNA-XNA/FNA (main) score 98

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:39.093667+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 2026-08-30T07:29:37.034255+00:00, confidence not recorded.
  - readme: https://github.com/FNA-XNA/FNA (fetched 2026-08-28T04:07:39.093667+00:00, sha 3e480a855312)
  - homepage: https://fna-xna.github.io/ (fetched 2026-08-29T09:44:29.749134+00:00, sha da309b3e8d23)
- Data as of 2026-08-30T08:39:29.467469+00:00.