Minecraft - A block-building game that allows you to create and explore entire worlds from scratch.
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.
Age of Mythology - Age of Mythology. The game that transports players to a time when heroes did battle with monsters of legend and the gods intervened in the affairs of mortals. Use mythological creatures like Minotaurs and Cyclopes to bolster your armies' strength.