RPG

Are you looking for a somewhat generic system that can handle a Frostpunk genre game? If so, Cypher System, Savage Worlds, Cortex Prime, or Fate would work depending on your other preferences in a system style.

I was trying to recall a TTRPG that I saw a while back that specifically focused on building a community that would work, but I'll have to post it later when I figure it out. Stupid faulty human memory.