Radiation Island
Could be interesting
Hardcore medieval multiplayer sandbox with terraforming, free preset and modular building construction, rich crafting (smelting, forging, farming, animal breeding etc.), survival, no target physics based combat, original combat formation system and numerous other features. Taking place in the fictional medieval world, game imposes a realistic system of global politics, economy, and socialization.
Rising World is an open-world sandbox game with randomly generated, fully destructible environments. Starting with the most basic of tools, collect resources to survive in the wildness. Evolve your world to create one of the biggest cities of all time or a gigantic castle, or simply let your imagination run riot! If being creative is all too much, just connect with your friends and get them to help. Rising World is a procedurally generated world, with fully textures landscapes, over 200 different building materials, loads of tools and many other items to help you create OR destroy your world without any restrictions.
Miscreated is a multiplayer online hardcore survival game set in a post-apocalyptic future. You will need to survive against mutants, players, and even mother nature herself.
A New Land, A New Life: Savage Lands is a gritty, brutal, first-person open-world fantasy survival experience in which players have only one goal: Stay Alive. Explore a world where days and nights are spent slaughtering vicious creatures, gathering scarce resources, building shelter and crafting powerful weapons needed to survive. Every decision counts, because one mistake can lead to an unfortunate encounter with death's cold embrace.
Empyrion - Galactic Survival is a 3D open world space sandbox survival adventure. Build mighty ships, menacing space stations and vast planetary settlements to explore, conquer or exploit a variety of different planets and the allegedly empty space!
Force of Nature is an indie open world sandbox game with fighting, crafting, building and farming systems.
Dude Simulator is an open world sandbox game. This is a life simulator. The main objective is to enjoy what you are doing.
Citadel: Forged With Fire is a massive online sandbox RPG with elements of magic, spellcasting and inner-kingdom conflict. You have complete freedom to pursue your own destiny; hatch plots of trickery and deceit to ascend the ranks among allies and enemies, become an infamous hunter of other players, build massive and unique castles, tame mighty beasts to do your bidding, and visit uncharted territories to unravel their rich and intriguing history. The path to ultimate power and influence is yours to choose.
Dude Simulator 2 is an open world sandbox game. This is a life simulator. The main objective is to enjoy what you are doing.
Set in a sleepy American country town in the 1980s, American Fugitive invites you to play as Will Riley. You're no angel, but you're not a killer. Yet the cold-blooded murder of your dad is the crime they've locked you up for. Fuelled by grief and a burning desire for vengeance, you must break out of jail to find the real culprit. It's payback time.