Games like Voidspace

Perpetuum is a massively multiplayer Sci-Fi RPG where players control huge robots and mechs to exploit an alien planet's resources using advanced mechanics. The game features a unique persistent world, complex infrastructure, and terraforming capabilities. Although the official server is shut down, the community can still play using private servers and the released source code.

In "Project 5: Sightseer," players become a drone pilot, navigating a futuristic city while taking photos of landmarks for clients. With a variety of drones and upgrades to choose from, players must balance speed and photo quality while avoiding obstacles and security measures. Successful missions earn rewards and reputation points, unlocking new challenges and customization options in this immersive, open-world flight simulation game.

"Starbase" is a science fiction open-world game in early access that combines single-player, co-op, and massively multiplayer options with a focus on building, designing, and battling in space. Its destructible environment and hybrid voxel/vertex mechanics allow for detailed simulations and creativity, but expect some bugs and grinding. The game includes impressive graphics, exceptional music, and a full roadmap of upcoming features.

Valnir Rok is a Norse-inspired survival RPG that lets you explore a vast open world, build and upgrade your own Viking settlement, and fight brutal clan wars against other players. Hunt, harvest, and forage for resources to craft weapons, armor, and structures, all while immersed in a rich and detailed narrative. Battle mythical beasts, form alliances with fellow Vikings, and prove your worth in epic quests to become a legendary warrior.

In "Outpost Zero," players lead a team of robotic assistants to build, automate, and defend a base on the alien planet of Gaiya. The goal is to prepare for future human colonists seeking to escape Earth, all while competing with other corporations for profit and survival. Players must balance resource management, base defense, and combat against alien creatures and pirate raiders to succeed .

"Tree of Life" is a sandbox game that allows you to build and manage your own village in a beautiful, procedurally generated world. You can create and customize your character, choose your role and allegiance, and explore diverse environments such as deserts and snowy fields. The game encourages creativity, freedom, and discovery, with the potential to build grand castles or a village for wanderers.

Dual Universe is a sandbox MMO set in a continuous, single-shard universe, allowing for a seamless player-driven economy and massive cooperative or PvP battles. Players can gather resources, craft and trade items, construct stations and spaceships, and explore or colonize the infinite procedurally generated universe. The game features a unique in-game programming language, allowing for customization and automation of ships, stations, and more.

CryoFall is a sci-fi open world colony simulation game where players can choose to play in PvE or PvP mode. The game features massively multiplayer options, including co-op and single-player, with good game mechanics and awesome graphics. Starting with primitive technology, players must progress towards modern industrial and space-age technology while building bases, farming, and exploring.

"Crestfallen: Medieval Survival" is an immersive RPG set in a detailed medieval open world, where you build and defend castles, engage in strategic battles, manage resources, and embark on epic quests. Experience the ultimate medieval fantasy, either solo or with friends, by constructing modular castles, training knights, and conquering fierce enemies. Your legacy in the realm awaits!

"Eco" is a survival game that simulates a realistic ecosystem, where players must build and maintain a society while protecting the environment from pollution and other threats. The game features crafting, building, and research systems, and allows players to create laws, form governments, and collaborate on complex projects. Players' actions have lasting consequences, making "Eco" a unique blend of survival, simulation, and education.