Ready for your next real-time strategy (RTS)? Siege Up! from developer Denis Zdorovtsov looks like it could be good fun.
With a cute low-poly style in a medieval setting you will be building up walls, and smashing them down with catapults and various other equipment across a story-driven campaign. There's also going to be an in-game editor, full multiplayer and even some co-op missions too. Check out their older trailer below to get an idea of it:
Asking the developer about Linux support, they confirmed: "This is not going to be a problem for me, because of using Unity3d that supports Linux. I myself was using Linux exclusively during my student times, so having more than enough experience of Linux platform for supporting it."
The release is still some time away, with their current target being early December this year. One that could easily be worth keeping an eye on.
You can follow Siege Up! on Steam.