Dwarf Fortress - Dwarf Fortress is a single-player fantasy game with two modes: fortress and adventure.
Planetbase - Planetbase is a strategy game where you guide a group of space settlers trying to establish an outpost in a remote planet.
RimWorld - RimWorld - A sci-fi colony sim driven by an intelligent AI storyteller.
Stellaris - Stellaris is an Adventure-based, RTS (Real-time Strategy) Space, Sandbox, Sci-Fi, Single and Multiplayer video game created and published by Paradox Interactive.
Terraria - Dig, Fight, Build! The very world is at your fingertips as you fight for survival, fortune, and glory.
Startopia - Micromanage a network of space stations to rebuild them into a thriving community.