Steel Partisan is a turn-based strategy game played out on a hex-based grid. You'll use mechs, tanks, and infantry to eliminate targets, protect your own leaders, or capture locations on the board. Development is still in the early stages, but eventually there will be a full campaign mode which will allow armies to fight multiple battles across a planet (and maybe even across multiple planets in a galaxy).
These screenshots show the tactical gameplay in the current build of Steel Partisan.