Games like Infinite Space

"Starship EVO is a work-in-progress space sim that offers a creative building experience, allowing players to build and customize starships, space stations, and handheld weapons using a variety of tools and options. The game currently features engaging space battles and plans to add a survival mode in the future. A Server/Client framework is used for multiplayer, which requires port forwarding." less than 400 characters, more than 100 characters.

"Starpoint Gemini Warlords" is a space-themed, real-time strategy game with RPG elements. Players can explore, mine, and combat in a vast open world, while also managing their own space station and fleet. Building and customizing ships, as well as forming alliances, are key features in this expansive game.

Ring Runner combines the fast-paced action of space combat with the rich story and skill variety of an RPG. Trek across the universe in a 30 hour long story-driven campaign based on a companion Sci Fi novel, or challenge 6 scenarios alone, cooperatively, or competitively through local or online multiplayer.

Xenoblade Chronicles X is a single-player, open-world action RPG in the Xeno series that offers exploration on foot or in giant humanoid robots called Skells. Skells can fly, traverse water, and transform into vehicles, enabling aerial battles and diverse methods of transportation. The game emphasizes exploration in a vast Sci-Fi world, promising engaging mechanics for dedicated players.

MENACE is a single-player sci-fi RPG where you lead a strike force of marines, mercenaries, and criminals in the lawless Wayback system. Command tanks, walkers, and infantry in tactical battles as you unite fractured factions against a mysterious threat. Featuring a gripping story, dense atmosphere, exceptional gameplay, and a spectacular soundtrack, it offers highly emotional and replayable experiences.

Planet Explorers is an open-world sandbox adventure game set on a distant planet. Players can build and customize their own tools, vehicles, and structures, while also gathering resources, completing missions, and fighting alien creatures. The game features a dynamic story generation system, allowing for a unique experience with each playthrough.

TINY METAL is a turn-based war game with a classic style. Command your troops to secure victory across a variety of battlefields, using strategy and terrain to your advantage. Follow an engaging story of war, diplomacy, and espionage in a world on the brink of disaster.

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.

In "Heart of the Machine," players control a powerful sentient Machine Intelligence in a turn-based sci-fi 4X RPG, with the ability to shape the world and story based on their choices. With various tools and objectives, players can decide the fate of humanity, ranging from benevolent leader to ruthless dictator, while managing resources and overcoming obstacles. The game is set in a post-apocalyptic Earth, where players must make strategic decisions to achieve their goals.

Star Traders: Frontiers is an open-universe space RPG where you captain a customizable starship and crew through a galaxy fraught with political intrigue, alien threats, and internal conflicts. Choose your path as a pirate, merchant, bounty hunter, or military captain while exploring procedurally generated star systems, engaging in dynamic battles, and shaping the fate of the galaxy.