Jumping to summary directly, it doesn't work.
Although Akka.dll can be placed into Plugins folder without too much trouble, the use of Akka fails. Trying to implement simple GreetingActor sample from official site can not even be run without probelm. The first error(at assemble loading) is from
Receive<Greet>(greet => {})The error is
Reference to type `System.Func`2<T,bool>' claims it is defined assembly `mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089', but it could not be found
Even if the line is commented, other part will still generate error at run time
TypeLoadException: Could not load type 'Akka.Event.EventStream' from assembly 'Akka, Version=1.2.0.33, Culture=neutral, PublicKeyToken=null'.
Akka.Actor.Internal.ActorSystemImpl..ctor (System.String name, Akka.Configuration.Config config) (at <ca083fc567ea43ddaf4e1ed1d63c779b>:0)
This is combined with Zenject, but I think it may not be any different with or without Zenject. Since Akka.dll is loaded, Unity is constantly crashed. Any script change or even some UI operation will result Unity crash. Under such extreme condition, the development won't go any further either.