The Kickstarter page for the open world sandbox RPG built on the CryEngine promises Linux support, even though CryEngine doesn't officially support Linux.
A new release for Linux in Steam's Early Access is Steam Bandits: Outpost what will become a free to play game in the future, it looks pretty decent too.
Something I completely missed is Crea, a cute looking 2D sandbox RPG which is now on Humble Store and looks very much like Terraria & Starbound, but that's not exactly a bad thing.
Terasology is an open-source survival and discovery game with influences from Minecraft, Dwarf Fortress, and Dungeon Keeper. The game is in a pre-alpha state, but it's already fun to play!
It's been a long time since I first told you about Build & Defend and it has come a long way, it now has over 10,000 registered players and it has released its 1.0 release.
Pixel Piracy is a side-scrolling 2d, real time strategy/sandbox/simulation game created by indie developer Vitali Kirpu and produced by Alexander Poysky. In the game, the player leads the life of a pirate captain. Recruit a crew, outfit and customize your ship and set sail on the open seas.
Secrets of Rætikon is an atmospheric, open-world, 2D exploration game set in the romantic wilderness of the Alps. Fly through savage mountains, encounter wild animal tribes and discover the secrets of an ancient culture.
Maia is a colony building game set in the not-so-distant future. Your colonists make planetfall on a hostile world and you must ensure their survival and their safety, constructing their off-world habitat from almost nothing and sheltering them from a dangerous, often deadly environment.
The only aim in Rust is to survive. To do this you will need to overcome struggles such as hunger, thirst and cold. Build a fire. Build a shelter. Kill animals for meat. Protect yourself from other players. Create alliances with other players and together form a town. Whatever it takes to survive.
Entropy is an open-universe science fiction MMO with a strong focus on freeform gameplay and large-scale space combat. Explore a hostile galaxy filled with over a hundred solar systems, each completely explorable, where you can hunt, trade, mine and salvage in order to survive.
NEO Scavenger is a game where you must survive in the wasteland long enough to figure out who you are. Each turn, you must decide where to go, how to scavenge for supplies, and how to deal with anything and anyone you encounter.
Described as an addictive hybrid of Super Metroid and Terraria, SteamWorld Dig is a platform mining adventure. Take the role of Rusty, a lone mining steambot, as he arrives at an old mining town in great need. Dig your way through the old earth, gaining riches while uncovering the ancient threat that lurks below...
Dyscourse, the new psychological survival adventure game from Owlchemy Labs (Snuggle Truck, Jack Lumber), will be completing its crowdfunding campaign on Kickstarter in only three days.
Cat Banana Studios is proud to announce the launch of the Kickstarter and Steam Greenlight campaigns for Imagine Nations. Imagine Nations is a sandbox game (think Minecraft or Cube World) that combines elements from all of your favorite games in a procedurally generated universe.