This was an open source collaborative project and totally free.

They worked more than 50 people, in their free time, from different fields to create a demo of an FPS with totally free technology.

We started to dump the information in a free wiki; http://svmres.pbwiki.com/

We worked asynchronously thanks to a domain that we bought http://svmres.org (currently not available):

Copy of svmres.org at http://svmres.wordpress.com/