Minetest - Minetest is a near-infinite-world block sandbox game and a game engine, inspired by InfiniMiner...
Homebrew: Patent Unknown - Homebrew: Patent Unknown is an Action-Adventure, Sports, and Multiplayer video game developed by Copybugpaste.
Minecraft - A block-building game that allows you to create and explore entire worlds from scratch.
Rover Builder - Rover Builder developed and published by Hatfuls Games is a Building, Strategy, and Single-player Simulation.
Terasology - Terasology (started under the name Blockmania) is an open source project started by Benjamin...
Cosmoteer: Starship Architect and Commander - Cosmoteer: Starship Architect and Commander published and developed by Walternate Realities is a Strategy, Single-player, and Multiplayer Simulation.