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In another genre, Banished might work for you. If Sim City had sex with /out/, this would be the game. Every person you are responsible of is "permanent" and if they die, they're gone for good. They can reproduce, but there's nothing abstract about that. It's survival in the wilderness, but with a bunch of people. I think you're 10 or 20 in the beginning. They also age.
I once lost everyone because nobody made babies and everyone got old. Turns out they only reproduce if they live with someone.
Great game, entirely made by a single person.