Letting players write code.

Hey people.

I have this dream project that I would like to work towards, but I want to know if its doable in unity.

I want to make an RPG game, where the player can make their own scenarios. So I would like to make a stand-alone toolset/program where the player could write code, defining the behavior of the "world". If you know Neverwinter Nights, its pretty much that concept, except I want to give the players the ability to change pretty much everything.

Anyway, is it possible to make an in-game script editor? Or perhaps let players use an external editor to write and compile C# or JavaScript files and then use them in-game? I know there are security risks that has to be addressed, but wouldn't it be possible to make the game run in a sandbox environment, that can only do certain things?

I hope it isn't too unclear, but if anyone has any insight or experience with this in Unity, I would be really happy.

Perhaps making the game in unity, and then the toolset in Java with something like jMonkey or something equivalent in C#?

Anyway, I'd love your input on wether this is possible or not?

/Morten