"Fusion Fall takes advantage of many new features in
Unity3D for creating large worlds. I live blogged some of the
details as Joachim presented them at the Unite Conference.
"Unity uses the Mono runtime on both Windows and MacOS and it
might become one of the largest deployment vehicles for the Mono
"There is an air of coolness in the fact that Mono is being used
on Windows instead of .NET. And part of it has to do with the fact
that Mono's open source engine allowed Unity to modify it to suit
their very specific needs."