Oxygen Not Included is on sale this weekend. If (like me) you happen to have wanted to play it for a long time, but were worried you lack the patience/stamina and give up after a couple of hours, the price is now at a level where buyer’s regret is rather unlikely.
If you like Rimworld, this is similar and just as awesome (maybe not as many war crimes)
Most of your war crimes happen because thermal dynamics are hard.