Just a quick tip this one: The Humble Monthly Bundle is quite hit and miss for Linux gamers, but the current one is actually not bad at all.
For $12 a month, which you can cancel at any time it will give you Civilization VI, Vikings scenario pack and the Australia civilization and scenario pack. That's actually pretty good, considering it also gives you 10% off Humble Store purchases.
You also gain access to the "Humble Trove", a collection of DRM free games like Torchlight, Torchlight II, LIMBO, Gone Home, Shadowrun Returns and quite a few more Linux games.
Last month had Tomb Raider, Dawn of War III, The Long Dark and more which was also a pretty good deal.