http://youtu.be/N92Rq5r7BXY
Please have a look at this new Linux and FOSS game promotion effort by a group of gaming news sites:
http://www.linuxgameawards.org/
Voting for the 10 nominated games (January 2014 game of the month award) is open now too: http://www.linuxgameawards.org/award-ins...nuary-2014
P.S.: Xonotic isn't included this time... but it is for sure a strong contestant when a new version is released :p