This is Alien Quake Version 1.1, which was the final updated version released. The update released had fixed some minor bugs in the initial release of the Alien Quake mod. To install just unzip the files into your quake directory and run. This is the Windows version, although I am sure it will work on Mac via Wineskin or various Mac OS X source ports for Quake. There was also a Dreamcast version I found earlier but I don't have a Dreamcast to test and verify that it works so I decided not include it. Enjoy!!