Masterspace Alternatives

Infiniminer is a multiplayer block mining game with several different player classes to choose from.

KAG is a game about mining, building castles and destroying your enemies. It is a side-scrolling 2D action multiplayer war game with focus on building, constructing siege machines and intense PvP combat.

The player begins the game as a newly created god, born from the prayers of a family. After saving the family's drowning son, the grateful family leads the player to their village. There, the player chooses a Creature.

Experience Minecraft in AR!.

The Fun-Focused Free Software Voxel World Game. Voxelands is a sandbox construction game based on Minetest.

Tired of the roblox tyranny and greed? The Novetus community game is the solution! Novetus was made to improve on RBXLegacy, with the addition of new features that enhance the launcher for mod development, player customization, and overall usability.

Space Engineers is a sandbox game about engineering, construction and maintenance of space works. Players build space ships and space stations of various sizes and utilization (civil and military), pilot ships and perform asteroid mining.

Castle Story is a creative voxel-based strategy game in which you can build castles one brick at a time using an army of little characters called "Bricktrons".

Trapped in the muck on an island, alone or with your friends, try to survive as long as possible by using the resources you find around the island.

A better fork of OpenDungeons with enhanced editor and tile — geometry distortions.

Blockland is an online multiplayer game where you build things with bricks. It's like playing with legos on the internet.

Avorion is a procedural co-op space sandbox where players can build their own space ships out of dynamically scalable blocks. Fight epic space battles, explore, mine, trade, wage wars and build your own empire to save your galaxy from being torn apart by an unknown enemy.