Dwarf Fortress - Dwarf Fortress is a single-player fantasy game with two modes: fortress and adventure.
Banished - As always, Email support (at) shiningrocksoftware (dot) com if you have any issues. This will likely be the last update of Banished, except for any major bug fixes. The OSX and Linux versions development has stopped, and won't be released.
RimWorld - RimWorld - A sci-fi colony sim driven by an intelligent AI storyteller.
Terraria - Dig, Fight, Build! The very world is at your fingertips as you fight for survival, fortune, and glory.
Stonehearth - I'm thinking of experimenting with making models for stonehearth. What are my options for the voxel model software? what would you recommend?
Prison Architect - Build and manage a maximum security prison