Command Ops 2
Harcore WW2 wargame, right down to the "counters on a board". This game is quite old. So old that the latest update to the AI has spent so long in gestation that many indy devs could have released two whole games by now. I've booted it up again... just because.
This is what they call "pausable continuous time", which means sort of real-time, except you're generally expected to pause a lot whilst you think, issue orders, etc. It's very complex, with detail down to individual troops and weapons, logistics, orders delay, command structures, etc. An interesting feature is that you generally tell a higher-level command to do something, and then the AI orchestrates the action of units under the command, so expect (like a real general) that some of your orders might not turn out exactly as you'd have done it. The basic unit size is a company (~100-200 men, or 6-20 tanks), and depending on scenario size you normally command anywhere up to about 1 corps (~400 units). The enemy AI is not always the best - it's too active at night (night actions were relatively rare), and it is a little too focused on objective points in a way that can make for unrealistic actions, but it's usually tough enough to make for a decent struggle.
Elite: Dangerous
Also an old game recently fired up again. After a screwed up expansion and a while in the doldrums whilst the devs did other things, the devs have recommitted to the game and are releasing new ships, content, and upgrading some of the gameplay, evidently to the pleasure of the players. Got myself a lovely new explorer ship with an amazing new FTL drive. It's probably still the best general space sim out there overall, bearing in mind that Star Citizen (LOL!) is still nowhere near release, although some of its rivals (No Man's Sky, X4) might be better at some specific features.