Factorio: Skylines. Adds citizens to the game. Attract various castes to your city in order to progress the game.
Large total conversion mods.
A small request for this forum: please don't use "SA" as shorthand for Space Age here. "Spage" or pretty much anything else works.
That acronym is a trigger for me. Most days I'm fine, but on dirty days it has the potential to send me directly to the shadow realm.
I know it's the standard abbreviation across Factorio communities, and I'm not asking anyone to change how they talk elsewhere. Just here.
If it slips through, no big deal. Just edit it when you notice, no apology needed.
Thanks for being cool about it! :)