War Thunder is a War MMO taking place during WW2, where you can control tanks, fleets or planes and engage in large scale fights. It has just been released for Linux and is both available on its official website (direct download here) as well as Steam (while the Linux icon may be missing still). Both versions are compatible.

I have seen a number of comments on the Linux version, and it seems to run very well even at max settings. This is, I believe, the first port by Gaijin Entertainment, a Russian Indie developer (they ported IL-2 Sturmovik for consoles a couple of years back). They released a very impressive trailer for the game back in October, using Live Actors and CG. Yup, it must have cost a shitload of money:

War Thunder is free to play so you can give it a shot and see for yourself if it’s for you or not. As usual for such F2P games, the business model revolves around in-game purchases, and on Steam a pack provides additional units as well as single player campaigns.

Note that War Thunder has Oculus Rift support and this may be one of the best games out there to try your Rift out on Linux out there.

While I cannot comment on that, there has been several comments recently that the game has worsen recently by introducing too much grinding to unlock new planes and new upgrades. Let us know in the comments if you had such an experience.