Prismata—Free Strategy Game
This is good!
I spent an hour in this 2018 freebie from the makers of that 10,000 puzzle game we discussed earlier. Very well presented, slick action and attractive graphics—and the flimsy story didn't get in the way in the first hour I played.
It's turn-based full-knowledge, so like chess in that. However, the mix of units is apparently random each game, so you can't just learn it by rote.
A perfect-information strategy game inspired by RTS, deckbuilders, and board games. Choose from three distinct technology classes and outwit your foes by snowballing your starting resources into a powerful cybernetic army. ABSOLUTELY NO PAY-TO-WIN
It's listed as Early Access, but comments say it was abandoned years ago—so don't buy the Founder's Edition unless you want to donate, it seems you won't get much for your money. The base game is free, I don't know how long it lasts, but so far looks like fun to find out.