Port a Godot 4 project (GDScript) to Unity, Unreal Engine, three.js/web or Godot C# with ReversePort — signals, node paths, autoloads, scenes, physics bodies, input actions and coordinates done right. Use whenever the source of a port is a Godot project, including "make a web/browser version of my Godot game".
Installs into .claude/skills of the current project.
Are you the author of Godot Port?
Add the live security badge to your README. It updates with every re-scan.
[](https://www.skillsdirectory.com/skills/laaielichter-godot-port)
---
name: godot-port
description: Port a Godot 4 project (GDScript) to Unity, Unreal Engine, three.js/web or Godot C# with ReversePort — signals, node paths, autoloads, scenes, physics bodies, input actions and coordinates done right. Use whenever the source of a port is a Godot project, including "make a web/browser version of my Godot game".
---
# Porting from Godot
Use the port-project skill for the loop; this skill holds the Godot-specific judgement.
## Before planning
- `re_scene {file:"project.godot"}` → main scene, autoloads (singletons), input actions, physics tick rate.
Autoloads become singletons (Unity: DontDestroyOnLoad MonoBehaviour; Unreal: GameInstanceSubsystem; web: module
singleton). Input actions must be recreated by name in the target.
- Binary `.scn`/`.res` cannot be read as text: open them in Godot and save as `.tscn`/`.tres` first.
- `port_map {from:"godot", to}` — read the conventions once; they decide naming and coordinates.
## Things that silently break
| Godot | Watch out |
| ------------------------------------------------------- | ------------------------------------------------------------------------------------------------- |
| `-transform.basis.z` is forward | Unity forward is +Z, Unreal +X. Never copy direction math unconverted. |
| `rotation` is radians, Euler order YXZ | Unity eulerAngles are degrees; three.js default order is XYZ (set `rotation.order = 'YXZ'`). |
| meters | Unreal is centimeters: speeds, forces, ranges, gravity ×100. |
| `_physics_process` at 60 Hz | Unity FixedUpdate is 50 Hz by default; Unreal ticks per frame. Retune or set the rate. |
| `move_and_slide()` uses `velocity` and delta internally | Unity `CharacterController.Move` wants a displacement (× deltaTime) and no built-in gravity. |
| signals connected in the editor | They live in `.tscn` `[connection]` sections: `re_scene` lists them; recreate each one. |
| `$Path` / `get_node` | Target: serialized references (Unity), component pointers (Unreal), direct references (web). |
| `await` on signals/timers | Unity: coroutines (or Awaitable); Unreal: timers/delegates; web: promises with a game-time timer. |
| groups | Unity tags, Unreal actor tags; port_scene carries the first group as the tag. |
| Camera3D `fov` is vertical | Unreal FieldOfView is horizontal: `port_convert {fov, aspect}`. |
## Targets
- **godot-csharp**: the smallest port. Scenes, resources and project.godot are copied with script paths swapped by
`port_scene`; only scripts are rewritten (`public partial class X : Base`, PascalCase API, `double delta`,
`[Export]`, `[Signal] delegate void XEventHandler()`, struct properties copied out and back).
- **unity**: scenes become `*.scene.json` specs + the editor builder; build them in Unity after the scripts compile so
components attach by class name.
- **threejs**: scenes become TypeScript builder modules (`buildMain()`); physics with Rapier; UI in HTML/CSS. Godot can
export meshes as glTF for GLTFLoader.
- **unreal**: scripts become `.h/.cpp` pairs with UCLASS/UPROPERTY/UFUNCTION; scenes become specs in cm, Z-up.
