Ace of Spades: Battle Builder - Say hello to the creative shooter. Create your battleground, destroy it, then create it again.
Minetest - Minetest is a near-infinite-world block sandbox game and a game engine, inspired by InfiniMiner...
Lunacraft - Lunacraft focuses on Endless Creativity and Exploration elements.
Roblox - Reimagining the way people come together.
Banished - As always, Email support (at) shiningrocksoftware (dot) com if you have any issues. This will likely be the last update of Banished, except for any major bug fixes. The OSX and Linux versions development has stopped, and won't be released.
Terraria - Dig, Fight, Build! The very world is at your fingertips as you fight for survival, fortune, and glory.