[maikklein]

Licensing How much does this cost?

To redistribute code written with Mono for Unreal Engine, you must have a commercial license to the Mono runtime.

These licenses are included in Xamarin's commercial products for targeting Mac, Android and iOS.

Xamarin product pricing starts at $0 for Starter Edition and adds Visual Studio support at $999 per developer, per platform.

In addition, you still need to comply to your license agreement with EpicGames for Unreal Engine.

[tormeh]

I'd lay the blame on Unreal here. It's possible to bundle the mono runtime with your game, it's just that Unreal has done it in a way that doesn't satisfy the LGPL. As long as the runtime is a separate binary for which all source is available, you're fine. This can be made completely invisible to the end user.

Maybe there's some difficulty I'm not seeing here, though.