Games like Starship Theory

Space Haven is a space colony simulation game where you lead a group of survivors in building a home among the stars. Manage resources, research new technologies, and navigate the dangers of space while dealing with the needs and personalities of your crew. Your decisions will determine the success or failure of your space voyage. Create and manage your own unique space habitat as you see fit.

Spacebase DF-9 is a spaceship colonization sim where players build and manage their own space station. Oversee crew members, manage resources, and defend against threats in this open-ended construction and management game. Your spacebase's survival and growth depend on your strategic decisions and ability to maintain order in the final frontier.

Cosmonautica is a single-player Science Fiction Simulation game with great gameplay, exceptional graphics, and a fantastic soundtrack. The game offers a humorous space trading and crew simulation experience in a procedurally generated galaxy, with diverse quests, pirate attacks, and unique crew members. However, it has issues with bugs that can affect gameplay.

"Starmancer is a single-player Science Fiction Role Playing game with phenomenal gameplay and delightful graphics, but be prepared for lots of grinding and bugs. As a Starmancer AI, construct and manage a space station for human refugees, encountering monsters, alien probing, and forbidden technologies in this vast wilderness of space."

"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.

"Celestial Command" is a challenging space shooter game that tasks players with defending their space station from waves of enemy ships. With a variety of weapons and upgrades to unlock, players must strategize and adapt to survive as long as possible. The game features a unique art style and frantic gameplay, making it a must-try for fans of the shoot 'em up genre. Reference: steamid: 330460 Fact

"Buoyancy is a single-player strategy game set in an ocean world, where you build and manage a floating city. Construct various buildings for resource production and population management, and keep your villagers happy and healthy. Explore the ocean to exploit resources and move your city for production boosts, as you manage a growing population and expanding city."

In "Star Command Galaxies," players build and manage their own spaceship, recruiting crew members and exploring a procedurally generated galaxy filled with alien races and challenging missions. The game offers real-time strategic combat and interactive ship building, allowing for customization and upgrades as players progress through the game. The humor-filled storyline and pixel art style create a unique and engaging experience for space exploration and management enthusiasts.

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.

Gnomoria is a single-player fantasy turn-based strategy game with good graphics and fabulous mechanics, allowing you to lead a group of gnomes to build and expand a kingdom in a procedurally generated world. With fully destructible environments and open-ended sandbox gameplay, craft items, build structures, set traps, and dig for resources, while managing a peaceful town or fending off invasions. Expect lots of bugs, high emotions, and endless replayability with various crafting mechanisms and contraption building.