If you're in a boardgame vibe, and like slow-paced, fairly complex and intricate, you might be in the mood for some Battletech. We had a thing going a while back, and I'd like to think the
introductory post I wrote is decent. The ruleset is complicated, but oh-so-satisfying once you get it. A roll of the dice can annihilate you. You can play alone against the bot using just MegaMek, though the bot isn't amazing. You can put together single-player (or multiplayer campaigns) for yourself using MekHQ. Or you can play online against other people in a massive campaign with persistence with MekWars.
There's also Blood Bowl, which you can get on Steam (Chaos edition), or play for free against other people using FUMBBL. It's a fantasy football game where your team is persistent across games. The ruleset is pretty heavy, but the basics aren't too hard to get. Gameplay is really tactical, and it's possible to estimate quite a few probabilities, like in Battletech. Both of these games take 1h-2h30m per game, so they're on the heavier side. But both of them feature really cool probability optimisation problems, lots of strategy, insane amounts of content, persistence, etc. They can be extremely fun if you're into this kind of stuff. They can also be incredibly frustrating when, after a 2h involvement, you lose because you get a derp roll of 2 which is the ONE THING YOU COULDN'T ROLL AND IT DESTROYS YOUR MECH OR KILLS YOUR BEST PLAYER. So yeah, if you can laugh it off, I'd highly recommend these two.
You might also like the Space Hulk or Space Hulk Ascension games that were released and are on Steam. The first one is a faithful adaptation of the board game, whereas the second takes some create freedom and makes the game more computer-game like.