Dwarf Fortress - Dwarf Fortress is a single-player fantasy game with two modes: fortress and adventure.
Terraria - Dig, Fight, Build! The very world is at your fingertips as you fight for survival, fortune, and glory.
RimWorld - RimWorld - A sci-fi colony sim driven by an intelligent AI storyteller.
Conan Exiles - Conan Exiles developed by Funcom and published by Koch Media.
Rust Game - Rust’s world is harsh. The environment is not kind. Bears and wolves will chase and kill you. Falling from a height will kill you. Being exposed to radiation for an extended period will kill you. Starving will kill you. Being cold will kill you.
Castle Story - The creative voxel-based strategy game in which you explore floating islands, architect epic castles, and defend against hoards of enemies with your friends!