Hi, @endel
This maybe fixed by the creator of msgpack-unity3d, could you test it and update unity3d plugin for colyseus ? Thanks in advaced.

Hi,
When import Colyseus unity3d client to Unity 2018.3.0f1 (Script Runtime Version 4.x), will throw error:
Assets\Plugins\GameDevWare.Serialization\Metadata\ReflectionUtils.cs(86,34): error CS0246: The type or namespace name 'DynamicMethod' could not be found (are you missing a using directive or an assembly reference?)
In Unity 2018.3.0f1, Script runtime version is 4.x, and will not support 3.5.x version, so please fix this bug !

Thanks in advanced.