Into The Breach is a turn-based tactical game that looks a bit like this:
Imagine Edge of Tomorrow meets Pacific Rim meets Advance Wars and you've got a good idea of what you're in for. The Vek, kaiju-like behemoths, have overtaken the world, so you're sent back in time to stop them with a complement of equally gigantic mechs. You fight them on an isometric battlescape, where your goal is generally to survive an onslaught and complete bonus objectives, in one of four environments with unique attributes.
More info and screenshots can be found on the subset games webpage
Much like FTL before it, a lot of the game is procedurally generated, and your playthroughs, be they victories or failures, lead to unlocking of new mech squads (each squad is comprised of 3 mechs, melee, ranged, and artillery) all of which have different attributes and types of attacks. On the battlefield, mech have pilots who gain experience through defeating the Vek, which can be done in a number of different ways. For example, on the ice terrain map, shooting ice turns it into water, and these kaiju can't swim. Alternatively, you can fire a shot so powerful it knocks the Vek back into a mountain, dealing extra environmental damage. Unlike games such as X-COM and Advance Wars, you can always see what your enemies are intending to do, whether it's new enemies burrowing up onto the battlefield, or a giant hornet trying to sting your mech (and yes, Vek attacks can damage Vek units), so good planning is critical. All the while you have to try and keep as many cities and power grids standing; losing the power grid over the course of the campaign is the strategic fail condition, and that's when you retreat to try and save another time line.
Oh, and as you might have noticed from the trailer, Ben Prunty is back for the music again, and they've got Chris Avellone on writing again as well!
Into The Breach is available on Windows platforms on Steam, GOG and Humble. The grapevine has indicated there should be later releases for linux and Mac as well.