Here’s the mod so far, still a work in progress, it’s GPL or whatever if you want to contribute: https://drive.google.com/open?id=0B4I6bOzuYWfBZmdVNkNReVc3eTQ
Here’s the latest release of quaketroid, currently there’s a bug with barrels exploding causing the game to crash. I did add the ice beam, although there’s no specific model for it’s blast and the charge isn’t fully implemented. Feel free to make your own modifications.
https://drive.google.com/file/d/0B4I6bOzuYWfBVjBuT1RRZE9fTEU/view?usp=sharing