Tactical Breach Wizards is on sale on Steam for $14.99 (25% off). By the same dev as Heat Signature and Gunpoint.
That game was a
ton of fun. Super tight, super polished, often very funny. They worked on it for six years, and it shows.
It looks like a tactical combat game, but it's more of a puzzle game, because you have unlimited rewind and you always know the exact outcome of every turn you take; nothing is final until you hit End Turn, see what will happen, and then accept the results.
You can certainly get yourself into an unsalvageable position, but in general it's much more puzzle-y than fight-y.
It was a great time. I didn't do most of the extra stuff, I stayed with the main missions. I got 21.7 hours out of it, and could have gotten probably 30 if I'd done all the optional stuff.