Single-player games like Master of Orion 3
Below are 14 single-player Steam games similar to Master of Orion 3, 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 Master of Orion 3 page.
Ranked picks
- 1
Master of Orion
Single-player alternative to Master of Orion 3 — playable solo, no multiplayer required. Shares Strategy with Master of Orion 3.
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.
- 2
Master of Orion 2
Single-player alternative to Master of Orion 3 — playable solo, no multiplayer required. Shares Strategy with Master of Orion 3.
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.
- 3
Master of Orion 1
Single-player alternative to Master of Orion 3 — playable solo, no multiplayer required. Shares Strategy with Master of Orion 3.
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.
- 4
ENDLESS™ Space 2
Single-player alternative to Master of Orion 3 — playable solo, no multiplayer required. Shares Strategy with Master of Orion 3.
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?
- 5
Sid Meier's Starships
Single-player alternative to Master of Orion 3 — playable solo, no multiplayer required. Shares Strategy with Master of Orion 3.
Build and command a fleet of starships and travel between planets as you explore, build, negotiate, and fight to preserve your vision for humanity.
- 6
Sid Meier's Civilization®: Beyond Earth™
Single-player alternative to Master of Orion 3 — playable solo, no multiplayer required. Shares Strategy with Master of Orion 3.
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.
- 7
Galactic Civilizations III
Single-player alternative to Master of Orion 3 — playable solo, no multiplayer required. Shares Strategy with Master of Orion 3.
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
Age of Wonders: Planetfall
Single-player alternative to Master of Orion 3 — playable solo, no multiplayer required. Shares Strategy with Master of Orion 3.
Age of Wonders: Planetfall is the new strategy game from Triumph Studios, creators of the critically acclaimed Age of Wonders series, bringing all the exciting tactical turn-based combat and in-depth empire building of its predecessors to space in an all-new, sci-fi setting.
- 9
Stars
Single-player alternative to Master of Orion 3 — playable solo, no multiplayer required.
《Stars》is a VR game about stars. you can completely relax, look up at the sky and listen to the story of each constellation.
- 10
Moo Lander
Single-player alternative to Master of Orion 3 — playable solo, no multiplayer required.
Moo Lander is a 2D action-adventure RPG with metroidvania elements featuring an epic plot, mighty cow bosses, beautiful environments, clever puzzles, and lots of milk!
- 11
Conquest of the New World
Single-player alternative to Master of Orion 3 — playable solo, no multiplayer required. Shares Strategy with Master of Orion 3.
Discover the uncharted during the Age of Exploration in this strategy game of exploration, combat and colony management.
- 12
Castles
Single-player alternative to Master of Orion 3 — playable solo, no multiplayer required. Shares Strategy with Master of Orion 3.
Design and build your own castle and defend it in real-time battle.
- 13
Castles II: Siege & Conquest
Single-player alternative to Master of Orion 3 — playable solo, no multiplayer required. Shares Strategy with Master of Orion 3.
In this game of medieval diplomacy, treachery & power. To win you must survive. To survive you must scout the surrounding territories, defeat the local militias, subjugate the land with castles, feed the people, forge diplomatic alliances, appease the church and unite the land under your iron fist.
- 14
Invictus: In the Shadow of Olympus
Single-player alternative to Master of Orion 3 — playable solo, no multiplayer required. Shares Strategy with Master of Orion 3.
Caught in a bitter feud between spiteful gods, you fight for more than your life in this strategy RPG. Enlist Hercules, Achilles, Electra and the mightiest of heroes in your struggle for an eternal seat atop Olympus. Create your own war host from over 30 distinct units.