Desura is a name that is going to come up a lot more often in the future, mainly because it's practically the only digital distribution platform for Linux games that presents itself in a commercial, but friendly manner. Sure, there are other options to buy games or to just download Linux games. Ubuntu Software Center is such a place, but that's a service focused on software and not entertainment. Moreover, a couple of other websites provide a sort of retail service for games, such as Tux Games. Unfortunately, looks like some of these providers are stuck in 1999 and none of them offer an independent client.