[Immolate]

This might sound really stupid but what about an offline version of GS2 that parses scripts as if a server exists but there actually isn't? You can still trigger to the server, but it still all be clientside. You'd still be able to script as if you're on a server but you're actually not. Of course, you'd need to harden on the do's and do-not's of client/server scripting but it could work.