Good news everyone:
I merged this syntax definition into the main channel of Sublime Text Package Control. This means that you can now install this package like you would any other in Sublime Text! It makes the process a lot easier and most importantly, you will automatically get updates. I added and corrected a bunch of stuff in the last few days, so you should check it out.
So if you installed the definition before, I would suggest removing the Chatscript.tmlangage* files from:
Windows: %APPDATA%\Sublime Text
OSX: ~/Library/Application Support/Sublime Text
Linux: ~/.config/sublime-text
Then install Package Control, and then install the Chatscript syntax package. The instruction are in the repo’s readme if you’re not sure how to do that.
Eventually, I plan on making it available for Atom and TextMate and would be willing to port it to other editors too, if there is interest. I also think it would be great to incorporate code completion as well. Alas, time is limited…Fork the repo if you want to help! Cheers