Voxel

Stonehearth features a procedurally-generated world where players manage a colony of people called "Hearthlings". Players are tasked with caring for their hearthlings including, feeding, sheltering, and defending them from the dangers like orcs and skeletons. Stonehearth was developed by Radiant Entertainment, a company founded by Tom and Tony Cannon, co-founders of the fighting game eSports event Evolution Championship Series. Described as a "passion project" by Tom Cannon, the brothers spent two years making a prototype before creating a Kickstarter campaign to fund the creation in 2013.

Unrailed! is a cooperative rogue-like multiplayer game where you have to work together with your friends to build a railway track across endless procedurally generated worlds. Master random encounters with its inhabitants, upgrade your train and keep it from derailing!

(Source: www.unrailed-game.com)

Free to play voxel based shooter by Ben Aksoy. (Also known as Ace of Spades Classic or Build and Shoot)

Fan made OpenGL port/remake of Ace of Spades. With enhanced visuals, lighting, gameplay and sound.

Ace of Spades: Battle Builder is the first-person shooter that lets you create your battleground, destroy it, then create it again.

Up to 32 players choose from 6 unique classes and jump into team-based, multiplayer mayhem across an endlessly evolving battlefield, to construct, destruct and take out the opposition. It’s like war, only better.