Just remember, if you are a penguin powered gamer, and you want your money to go to the Linux devs, you need to buy it when the Linux version is out (assuming you don't have it already).
You might be able to buy it now, not install it at all, and then fire it up when the Linux version ships, but I'm not 100% on that. (see Kristian Joensen's link further down. Linux gaming friends don't let Linux gaming friends buy games before they have a Linux port!)
This comment was edited on Dec 7, 2014, 16:28.
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Rockstar made $1 billion in 3 days with GTAV, yet they can't find the budget to port RDR to PC.