Games like Rionag: Survey Fleet

"The Last Starship" is a sci-fi strategy survival game where players must build and manage a last surviving starship. Gather resources, manage systems, and navigate through procedurally generated galaxies, facing challenges and enemies along the way. The game features crafting, building, and exploration mechanics, with an emphasis on survival and resource management in a procedurally generated universe.

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.

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.

"Sweet Transit" is a city-building and transportation management game set in a charming low-poly world. Design and grow your own towns, create efficient rail and road networks, and transport goods and passengers to keep your economy thriving. With weather and day-night cycles, seasons, and a variety of landscapes, the game offers a relaxing and engaging experience.

"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.

Solargene is a single-player Science Fiction Strategy game with beautiful visuals, set in the near future of human expansion in the Solar System. The game features 10 unique planets and moons with distinct mineral deposits, time-of-day changes, and environmental factors. Players will manage the construction of colonies, from small buildings to entire cities, with a simple yet powerful building system, and tackle various challenges as they expand humanity's reach in the solar system.

"Final Factory is a spaceship-building and factory management game with an infinitely generating map. Create and automate space-faring factories, advance through a tech tree, and design ships for exploration, combat, and logistical purposes. Protect your base from alien threats as you expand across the cosmos."

"Space Trash Scavenger" is a 3D raft-building game set in the 31st century, where you explore procedurally generated space debris for resources and loot. Build and expand your Space Rig with the necessary equipment for survival and defense, while managing power, artificial gravity, and trash processing. Navigate through asteroids, abandoned outposts, and derelict spaceships, salvaging valuable materials and upgrading your space suit, weapons, and ammo.

Endzone 2 is a strategy game where players manage multiple settlements across different zones, each with exclusive resources. The game features improved settler behavior for thriving communities and the addition of vehicles for flexibility in settlement placement and progression. Key changes and additions have also been made from the previous game, Endzone - A World Apart.

"Shortest Trip to Earth" is a roguelike spaceship simulator where you navigate through a procedurally generated universe. Manage your crew, ship systems, and resources while encountering various alien species and events. Your goal is to reach Earth, but with permadeath and randomly generated challenges, each playthrough is a unique journey.