Single-player games like Interstellar Space: Genesis
Below are 15 single-player Steam games similar to Interstellar Space: Genesis, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Interstellar Space: Genesis page.
Ranked picks
- 1
Horizon
Single-player alternative to Interstellar Space: Genesis — playable solo, no multiplayer required. Shares Strategy and Indie with Interstellar Space: Genesis.
Horizon is a turn-based space strategy game of galactic exploration and conquest in which you are in control of humanity’s destiny. You will explore deep space, find new frontiers and discover alien artifacts hidden on long-abandoned planets.
- 2
Stars in Shadow
Single-player alternative to Interstellar Space: Genesis — playable solo, no multiplayer required. Shares Strategy and Indie with Interstellar Space: Genesis.
Stars in Shadow is a turn-based 4X strategy game and a vivid tribute to the genre classics. Compete with alien factions to explore and colonize nearby starsystems, build fleets to defend against rivals, negotiate or conquer them. Win by unifying the galaxy, through diplomacy or force.
- 3
Pax Nova
Single-player alternative to Interstellar Space: Genesis — playable solo, no multiplayer required. Shares Strategy and Indie with Interstellar Space: Genesis.
A sci-fi turn-based 4X strategy game where you lead the fate of one of several factions divided between three races. Explore new worlds and new star systems filled with exciting secrets as well as dangers. Build cities, expand your influence and fight great battles on land and in space.
- 4
ENDLESS™ Space - Definitive Edition
Single-player alternative to Interstellar Space: Genesis — playable solo, no multiplayer required. Shares Strategy with Interstellar Space: Genesis.
ENDLESS™ Space is a turn-based 4X strategy game, covering the space colonization age in the ENDLESS™ Universe, where you can control every aspect of your civilization as you strive for galactic domination.
- 5
ZEPHON
Single-player alternative to Interstellar Space: Genesis — playable solo, no multiplayer required. Shares Strategy with Interstellar Space: Genesis.
From the developers of Warhammer 40,000: Gladius, ZEPHON is a post-apocalyptic 4X strategy game built on Proxy’s unique tactical combat system. Guide survivors through a turbulent future, navigating unexpected disasters, eldritch horror and cyberpunk monstrosities. What will you do to survive?
- 6
Final Theory
Single-player alternative to Interstellar Space: Genesis — playable solo, no multiplayer required. Shares Strategy and Indie with Interstellar Space: Genesis.
Final Theory is a 4X-lite turn-based strategy game where you command fleets of battleships engaged in a galactic civil war. It presents an exciting experience for both veteran players and those new to the genre. It features innovative combat mechanics but also hearkens back to some of the classics.
- 7
Galactic Civilizations III
Single-player alternative to Interstellar Space: Genesis — playable solo, no multiplayer required. Shares Strategy with Interstellar Space: Genesis.
Build a civilization that will stand the test of time in the largest space-based strategy game ever! Choose from dozens of unique races and make a name for yourself across the galaxy through diplomacy, espionage, technological advances, and more.
- 8
Sid Meier's Civilization®: Beyond Earth™
Single-player alternative to Interstellar Space: Genesis — playable solo, no multiplayer required. Shares Strategy with Interstellar Space: Genesis.
Sid Meier’s Civilization: Beyond Earth is a new science-fiction-themed entry into the award winning Civilization series. As part of an expedition sent to find a home beyond Earth, lead your people into a new frontier, explore and colonize an alien planet and create a new civilization in space.
- 9
Master of Orion 2
Single-player alternative to Interstellar Space: Genesis — playable solo, no multiplayer required. Shares Strategy with Interstellar Space: Genesis.
Forge an empire in a universe where population growth is stripping away planetary resources. Colonize unknown planets and trade with other races for their knowledge.
- 10
ENDLESS™ Space 2
Single-player alternative to Interstellar Space: Genesis — playable solo, no multiplayer required. Shares Strategy with Interstellar Space: Genesis.
ENDLESS™ Space 2 is a Strategic Space Opera, featuring the compelling “just one more turn” gameplay, set in the mysterious ENDLESS™ Universe. As the leader of your civilization, will you impose your vision and build the greatest stellar empire?
- 11
Stellaris
Single-player alternative to Interstellar Space: Genesis — playable solo, no multiplayer required. Shares Strategy with Interstellar Space: Genesis.
Explore a galaxy full of wonders in this sci-fi grand strategy game from Paradox Development Studios. Interact with diverse alien races, discover strange new worlds with unexpected events and expand the reach of your empire. Each new adventure holds almost limitless possibilities.
- 12
Polaris Sector
Single-player alternative to Interstellar Space: Genesis — playable solo, no multiplayer required. Shares Strategy with Interstellar Space: Genesis.
Can anyone build an empire in a place like this? Other factions are naturally suspicious of newcomers and may wage war at the first sign of unidentified craft. Here, a natural death is an uncommon luxury.
- 13
Remnants of the Rift
Single-player alternative to Interstellar Space: Genesis — playable solo, no multiplayer required. Shares Strategy and Indie with Interstellar Space: Genesis.
How far would you go to find closure — to the end of another dimension? As a dimension-diving merc, Morgan must ride the frequencies between worlds to discover the secrets of a new reality. Pause, plan, and play in a groovy retro-futuristic world, in this real-time roguelite action game.
- 14
Galactic Civilizations IV
Single-player alternative to Interstellar Space: Genesis — playable solo, no multiplayer required. Shares Strategy with Interstellar Space: Genesis.
Take command of a civilization that has just achieved faster-than-light travel in Galactic Civilizations IV, the newest entry in the award-winning space 4X strategy game series. Explore the galaxy, colonize worlds, shape cultures, make alliances, fight wars and pioneer new technologies.
- 15
Master of Orion
Single-player alternative to Interstellar Space: Genesis — playable solo, no multiplayer required. Shares Strategy with Interstellar Space: Genesis.
The ascendant spacefaring 4X strategy game returns! A new chapter in the epic Master of Orion saga is poised to once again capture the imaginations of millions of gamers.