No special “JOIPlay plugin” exists — instead, use plugins. Examples:
If you see an error stating the game type is not supported, the Unity build may be using a very recent version of the engine. Roll back the game to a patch from a year or two ago if possible, or enable in the game settings within JoiPlay. unity+plugin+for+joiplay+work
In very old versions of JoiPlay, some users found that the Crosswalk plugin (originally for HTML5) could launch certain Unity WebGL builds. This is —Crosswalk is deprecated, and modern JoiPlay versions have dropped it. No special “JOIPlay plugin” exists — instead, use
While JoiPlay has native support for specific engines (RPGMaker, Ren'Py), Unity games require a more robust environment due to their complex 3D rendering and scripting capabilities. unity+plugin+for+joiplay+work