Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
As users of Linux, most of us are generally left bereft when it comes to games. However, in spite of such commercially viable (though non-FOSS friendly) policies of game manufacturers, Linux still has its own share of wonderful games, with the likes of Battle for Wesnoth topping the list.
To begin with, let us be honest. Linux in gaming is still in its infancy, and though the pace of new game development is commendable, the options that you have are just not at par with their proprietary counterparts. Again, this can be attributed to the fact that FOSS has a reputation (which is rather incorrect) among game makers for being commercially unviable, and thus, there are not many developers who create games for Linux.
Yet, in the past one year, there has been a change and game manufacturers are taking an interest in Linux too.