MonoGame alternatives for C# developers

The main MonoGame alternatives for C# developers fall into two groups. Frameworks close to MonoGame are FNA, an accuracy-first reimplementation of XNA 4.0; KNI, a MonoGame derivative that adds web browsers and VR headsets; and raylib-cs, C# bindings to the C library raylib. Engines are Stride, which has an editor but also supports code-only projects; Godot with C#, which is editor-first; and onegame, a code-first engine with no editor that builds in multiplayer sync, a UI kit and automated testing. Choose a framework if you want MonoGame’s level of control with a different platform list. Choose an engine if you want to stop writing the engine yourself.

Every fact about another project below comes from its own website, documentation or NuGet listing, linked in place and read on October 26, 2026. Check the current page before you decide.

MonoGame alternatives at a glance

“Not documented” means the project’s own pages read for this article don’t say. MonoGame’s platform list is from its NuGet README, which also notes that “Vulkan and DirectX12 graphics support is also being added in preview”. MonoGame’s home page adds that it has “no subscription model, royalty payments, licensing costs, or runtime fees”.

MonoGame vs Godot

These are different kinds of tool. MonoGame “does not include any pre-built editors or interfaces; instead, it gives developers the freedom to create their own working environment” (MonoGame docs). You write the game loop, the scene structure and the tools. Godot is an engine built around its editor, with scenes, nodes and signals, and C# is one of its languages. Two facts from Godot’s C# page matter for a C# developer: “Projects written in C# using Godot 4 currently cannot be exported to the web platform”, and Android and iOS support for C# “is available as of Godot 4.2, but is experimental and some limitations apply” (Godot C# basics). If you are on MonoGame because you want to work in code, Godot asks you to work in its editor. If you want an editor, it is MIT licensed and free.

MonoGame vs FNA

Both reimplement XNA. FNA’s stated goal is “to preserve the XNA game library by reimplementing XNA itself, with an incredible focus on accuracy”. It builds one assembly that runs on Windows and Linux, and its focus is on “fully open platforms”, primarily the desktop (fna-xna.github.io). MonoGame extends the XNA API across more platforms, including mobile and, for authorized developers, consoles. If you are porting an existing XNA game to the desktop, FNA is built for that job. If you are starting a new game that must ship on phones, MonoGame lists more targets.

Raylib vs MonoGame

raylib-cs wraps a C library. Version 8.1.0 targets .NET 8 and .NET 10, uses raylib 6.0, ships native runtimes for desktop and browser-wasm, and is described by its maintainers as passively maintained: “Occasional updates may be released from time to time” (NuGet). The package includes a browser runtime, which MonoGame’s platform list doesn’t. MonoGame gives you an XNA-shaped API, a content pipeline, mobile targets and console access for authorized developers.

KNI and Stride

KNI keeps the XNA API and adds targets MonoGame doesn’t list: web browsers and WebXR through WebGL, and Oculus VR (KNI README). If the web is the reason you are looking, it is the closest swap.

Stride is a full 2D and 3D engine with physics, a particle system, navigation meshes, VR support and a suite of editors (features). Its editor runs natively only on Windows, but its platform page lists building without the editor and code-only development on Windows, Linux and macOS (Stride platforms). Version 4.4 was announced on October 9, 2026, with a Vulkan and Direct3D 12 rewrite, a CLI tool and Native AOT.

Where onegame fits

onegame is for MonoGame developers who like working in code and are tired of building the engine around the game. There is no editor: a game is C# plus text assets, and the onegame command builds, runs, tests and exports it. What it builds in:

• 2D drawing and input. Entities draw sprites, sprite-sheet animations, shapes and text from view code with Draw2D. Input is declared as actions with default keyboard and gamepad bindings, and players can rebind them. A Debug build reloads pictures when the file changes.
• Entities with synced state. An [Entity] class holds [Synced] properties, [Command] methods, a fixed-tick OnTick and [View] members. Source generators write change tracking, codecs, deltas and snapshots.
• A deterministic simulation, enforced. Fixed-point numbers and named random streams, and analyzers that make floats, clocks, threads and I/O in sim code compile errors (details).
• Multiplayer. Client/server sync with per-connection visibility, client-side prediction with rollback, drift hashes, reliable UDP and WebSocket transports, and dedicated servers.
• UI. A retained UI tree with CSS-model styling and flex layout, and a component kit with controller navigation (UI guide).
• Testing. YAML scenario tests, record and replay, screenshot tests with a tolerance, a C# test API and live control over MCP (automated game testing).
• Shipping. NativeAOT exports for Linux, Windows and macOS, Steam integration and a Steam Deck runtime check.

And what it doesn’t do, at 1.2.0:

• No physics engine. Collision and movement are your own simulation code.
• Not an ECS. Entities are classes. For hot loops there are [HotData] struct-of-arrays tables.
• Web, Android and iOS exports need an engine checkout. From the NuGet packages you get Linux, Windows and macOS, and dedicated servers for Linux.
• No editor, by design. Consoles aren’t covered in its docs.

Try it in a terminal

dotnet tool install -g RecursiveAI.OneGame.Cli --version 1.2.0
onegame new meadow
cd meadow
onegame run --headless --frames 60 --json
onegame test
onegame export --target linux

created /tmp/games/meadow
  cd /tmp/games/meadow
  onegame build
  onegame run --headless --frames 60
  onegame test

{"ok":true,"game":"meadow","headless":true,"frames":60,"tick":60,"hash":"4cae793ac9d6b058","width":1280,"height":720}

PASS ship-looks-right (467 ms, tick 40, hash 1d9032e311c8f909)
PASS steer-ship (4 ms, tick 22, hash 356d3b991d053534)
2 passed, 0 failed

exported meadow 1.0.0 for linux-x64 (nativeaot): 6 files, 7622 KiB
  folder:  /tmp/games/meadow/export/meadow-1.0.0-linux-x64
  archive: /tmp/games/meadow/export/meadow-1.0.0-linux-x64.tar.gz (3689 KiB)
  warning glibc_too_new: Meadow needs glibc 2.38, newer than 2.31 in Steam's Linux runtime (and so on the Steam Deck). Build on an older system, or inside the Steam Linux Runtime SDK: see docs/exporting.md.

That is a scaffolded game built, run headless for 60 frames, tested with its two scenarios (one steers the ship through the input actions, one compares a screenshot) and exported as a NativeAOT Linux build, all from NuGet. The glibc_too_new warning only matters for Steam’s Linux runtime. The same game asked for a web build stops with exit code 3:

error: The web export needs the engine sources (its page and script files), so it runs for a game that sets OneGameRoot to an engine checkout (onegame new --engine <checkout>). A game on the RecursiveAI.OneGame.Sdk package cannot export for the web yet.

The onegame for MonoGame developers guide maps Game, Update, Draw and the content pipeline to onegame and ports a small game loop.

How to choose a MonoGame alternative

• Porting an XNA game to the desktop: FNA.
• Keeping the XNA API but adding the web or VR: KNI.
• Bindings to a C library, with a browser runtime in the package: raylib-cs.
• A full 3D engine with physics and editors, in C#: Stride.
• An editor-first engine, and web export doesn’t matter for C#: Godot.
• Code-first, with multiplayer, UI and automated tests built in, shipping on desktop and Steam: onegame, provided you can write your own movement and collision.
• Consoles today: MonoGame and FNA list them, with platform-holder access.

To try onegame, follow Getting started.