Terraria!

Starbound is an indie game being produced by the UK-based independent game studio Chucklefish Ltd. Starbound takes place in a two-dimensional, procedurally generated universe which the player will explore in order to obtain new weapons, armor, and miscellaneous items. Starbound entered beta testing on December 4, 2013 for Microsoft Windows, OS X and Linux.

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. Some inspirations for the game are Soldat, Minecraft, Dungeon Keeper & Ace of Spades. Currently available on Windows, Linux and MacOSX.

Creativerse is a sandbox adventure game set in a beautiful yet treacherous world shrouded in mystery. Adventure solo or bring your friends, unearth secrets, and tame the land together!

The Fun-Focused Free Software Voxel World Game.

Growtopia is an experimental multiplayer creative sandbox platformer with crafting. There are no goals, just an infinite number of worlds where you can create whatever you want with all your friends. Everything in the world can be grown from trees - plant Dirt Trees, Lava Trees, and of course Jetpack Trees. Discover new items by mixing the seeds of trees you already have.

Mythruna is a game under construction combining extensive world building, crafting, and sandbox elements with just a touch of role-playing. When completed, Mythruna will be a unique gaming experience.

Play as Wilson, an intrepid Gentleman Scientist who has been trapped by a demon and transported to a mysterious wilderness world. Wilson must learn to exploit his environment and its inhabitants if he ever hopes to escape and find his way back home. Enter a strange and unexplored world full of strange creatures, dangers, and surprises. Gather resources to craft items and structures that match your survival style. Play it your own way as you unravel the mysteries of this strange land.

Night is falling and your blockhead is freezing. You haven't yet made shelter and your campfire has gone out. All you have is a spade, some wood and a few sticks. You have only minutes before exhaustion hits. Do you create a bed, dig a cave or refuel your fire?

Block Story combines a mineable blocky world pioneered by Infiniminer and made popular by Minecraft with exciting and addictive role playing.

OpenClonk is a free multiplayer action game where you control clonks, small but witty and nimble humanoid beings. The game is mainly about mining, settling and fast-paced melees. OpenClonk is not just a game but also a versatile 2D game engine that allows the creation of countless new mods.

Stonehearth is a game about exploration and survival in an epic fantasy setting. Your job is to help a small group of settlers survive and carve out a place for themselves in a hostile land. You’ll need to establish a food supply, build shelter, defend your people, and find a way to grow and expand, facing challenges at every step.

I have said a few times that Epic Inventor was inspired by Terraria. There are obvious similarities you can see right away in the various screenshots I’ve posted. Certainly our desire to create a game was inspired by it as well. We love that game. We played it a lot.

Expanding upon the immensely popular action-sandbox title Terraria, exploring what might have been, and approaching gameplay in a new direction; Terraria: Otherworld represents a novel take on the Terraria experience.

Freeminer is a Minecraft-inspired sandbox game.