Games like Celestial Command

"HELLION is a Science Fiction Simulation game that offers both single-player and multiplayer modes, including co-op and PvP. The game boasts a good plot, spectacular gameplay, and wonderful visuals, but is hindered by numerous bugs, optimization issues, and grinding. Despite a bumpy start, HELLION delivers a unique and complex multiplayer space survival experience."

"Medieval Engineers" is a sandbox game set in the medieval era, focused on realistic engineering principles. Players can build various structures, such as castles and siege machines, using a variety of materials. The game also features a physics-based destruction system, allowing for realistic deconstruction and demolition of creations.

"Kinetic Void" is a sandbox-style space simulation game that allows players to build and customize their own spaceships while exploring the universe. The game features a dynamic economy, interactive ship components, and multiple factions to interact with. Players can engage in combat, trade, or diplomacy as they navigate the open world of "Kinetic Void".

"Osiris: New Dawn" is a sci-fi survival game where players explore and colonize alien planets. Gather resources, build bases, and advanced technology to survive against the harsh environment and alien creatures. Fight solo or with friends in online multiplayer mode to expand your territory and uncover the mysteries of the galaxy.

Maia is a space colony simulation game set on a toxic alien world, 12 light years from Earth. Your mission is to establish humanity's first foothold in the stars by building and managing a base to sustain colonist's needs, while surviving various dangers such as toxic atmosphere, solar flares, and earthquakes. The game features an enormous procedurally-generated world, including a series of vast mission areas with fully simulated environments.

"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.

Starship Theory is a single-player strategy game where you build and manage a starship while surviving in unknown space. Oversee your crew's training, mine asteroids, trade with neutral ships, and research new technology to improve your starship. Brace yourself for various challenges, such as hostile targets, collisions, and scorching heat while navigating the depths of space.

Interstellar Rift is a sandbox-style RPG set in the vastness of space. Players can explore, trade, and build their own spaceships as they navigate an open world filled with procedurally generated galaxies and alien races. Collaborative gameplay is encouraged, with the option for players to form factions, engage in piracy, or work together on massive capital ships. The ship-building aspect is highly detailed, allowing for customization of every aspect from engine to weaponry.

An epic adventure awaits you in Castle Story, a strategy game where you command friendly creatures called Bricktrons. Have them explore, carve, dig and gather resources from vast, spectacular floating islands, reshaping the voxel-based world to your desire! Design and build any structure you can imagine! From mighty and legendary castles to sprawling Bricktron villages. Beware, your Bricktrons w…

Empyrion: Galactic Survival is a space survival adventure game that lets players build and pilot their own space ships and stations. Explore, mine, and fight across procedurally generated planets and alien structures in a vast, open universe. Experience a mix of sandbox construction, survival, and combat gameplay, with a heavy emphasis on player freedom and creativity.