Games like Space Alliance: Frontier

Space Station Tycoon is a space-themed simulation game where players build and manage their own space stations. Construct and maintain various facilities, manage resources, and ensure the happiness of station inhabitants, while dealing with challenges such as space storms and limited budgets. The ultimate goal is to create a successful and self-sufficient space colony.

"Void Destroyer 2 is a open-world space sandbox game set in a desolate asteroid field, where you must survive by engaging in combat, managing tactics, and making strategic decisions. Start from humble beginnings and rise to power as a mercenary, pirate, bounty hunter, or entrepreneur, building your own trading or mining business. The game offers a wide range of freedom for players to choose their own path to domination, including the option to fight hard or negotiate your way to the top." NO INFORMATION AVailable about release date or developer/publisher.

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.

In "Star Wolves," you command a spacecraft and lead a team of mercenaries in an open-world, real-time tactical game set in the vastness of space. Engage in fierce combat, upgrade your ship and crew, and make choices that impact the story in this thrilling blend of role-playing and strategy. Combat is fast-paced and brutal, and your choices will determine your fate as you navigate a complex and intriguing plot.

"Ceres" is a single-player Science Fiction Role Playing game with a good plot set in a ravaged solar system where Earth has been destroyed. The solar system has been changed due to the malfunctioning of the Gate, a device built to connect Earth to other stars. Now, human factions are at war, monstrous machines and alien creatures roam, and real dangers and myths intertwine in this cold, dangerous world. However, be aware that the game is very buggy.

X4: Foundations is a sandbox space simulator that allows players to explore, trade, fight, and build in a vast universe. Take control of your own space empire, where every decision from ship hiring to trade routes has a direct impact on your income and influence. With a dynamic narrative and a variety of factions to interact with, X4: Foundations offers a rich and immersive space experience.

Spacecom is a Science Fiction Real-Time Strategy game that focuses on strategic thinking and tactical decision-making, with no emphasis on fast clicking. Play across diverse single-player campaign missions, intense multiplayer matches with up to 5 opponents, or AI skirmish mode. Immerse yourself in starfleet command with austere soundscapes and outsmart your enemies using proven maneuvers or your own creative strategies.

"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.

"Starpoint Gemini 2" is a single-player space action RPG that allows players to explore, battle, and trade in a vast open world. Customize your spaceship and crew, engage in tactical combat, and navigate a complex storyline set in a dynamic universe. With a sandbox-style gameplay and various side missions, this game offers a rich and immersive experience for space exploration enthusiasts.

"Helium Rain" is a single-player space simulation game that allows you to manage and expand your own space corporation. You'll explore, trade, and battle your way through a vast, procedurally generated universe, with real-time physics and advanced AI. Your choices will shape the fate of your company and the political landscape of the galaxy.