Terraria - Dig, Fight, Build! The very world is at your fingertips as you fight for survival, fortune, and glory.
Dwarf Fortress - Dwarf Fortress is a single-player fantasy game with two modes: fortress and adventure.
The Blockheads - Night is falling and your blockhead is freezing.
RimWorld - RimWorld - A sci-fi colony sim driven by an intelligent AI storyteller.
Clonk Rage - Real-time multiplayer game. Players can download more than 47475 maps at ccan.de
Minecraft - A block-building game that allows you to create and explore entire worlds from scratch.