Dwarf Fortress - Dwarf Fortress is a single-player fantasy game with two modes: fortress and adventure.
OpenTTD - An open-source clone of the classic game ...
RimWorld - RimWorld - A sci-fi colony sim driven by an intelligent AI storyteller.
Stardew Valley - Stardew Valley is a 2D Awesome, Action, Role-playing, Crafting, Top-down, Building, Sandbox and Single-player video game create by ConcernedApe and published by Chucklefish.
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!
RollerCoaster Tycoon Classic - Create and run amazing parks on your iPhone or Android.