Single-player games like Siege of Centauri
Below are 23 single-player Steam games similar to Siege of Centauri, 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 Siege of Centauri page.
Ranked picks
- 1
Adapt or Perish
Single-player alternative to Siege of Centauri — playable solo, no multiplayer required. Shares Action and Strategy with Siege of Centauri.
This is more than just an odd looking strategy game, it is a strategy platform. Genetically engineer amorphic creatures & buildings, in real time, in an endlessly open world that adapts to your playstyle. Share, and even battle your designs. How much will they be worth?
- 2
Micro Annihilation
Single-player alternative to Siege of Centauri — playable solo, no multiplayer required. Shares Action and Strategy with Siege of Centauri.
Micro Annihilation is a real-time strategy where your battlefields are inside homes, offices, and everything in between. Airlift troops onto the dining room table, launch artillery across the bedroom, and bring down the house while waging war upon a new mysterious foe.
- 3
Supreme Commander: Forged Alliance
Single-player alternative to Siege of Centauri — playable solo, no multiplayer required. Shares Strategy with Siege of Centauri.
The last days of man are at hand.. Two years after the Infinite War the once great warring nations now lie in ruins, and humanity’s hope for a brighter future is nothing but a bitter memory. A new, seemingly unstoppable enemy, supported by the zealots of The Order, now seeks to eradicate mankind: UEF, Aeon Loyalist, and Cybran alike.
- 4
Stronghold Crusader HD (2012)
Single-player alternative to Siege of Centauri — playable solo, no multiplayer required. Shares Strategy with Siege of Centauri.
The highly anticipated sequel to the best-selling Stronghold, Stronghold Crusader HD throws you into historic battles and castle sieges from the Crusades with fiendish AI opponents, new units, 4 historical campaigns and over 100 unique skirmish missions.
- 5
Band of Defenders
Single-player alternative to Siege of Centauri — playable solo, no multiplayer required. Shares Action with Siege of Centauri.
A Co-Op FPS game with base building in a post-apocalyptic world. Craft weapons, build barricades and automated turrets, unlock new gear and items for visual customization and kill all savages and mutants trying to destroy the remnants of human civilization.
- 6
Act of Aggression - Reboot Edition
Single-player alternative to Siege of Centauri — playable solo, no multiplayer required. Shares Strategy and Indie with Siege of Centauri.
Act of Aggression – Reboot Edition brings the techno-thriller RTS game Act of Aggression to a higher level. The Reboot Edition offers a full gameplay overhaul in skirmish mode against the AI and in your multiplayer battles.
- 7
SPACE BATTLE: Humanity
Single-player alternative to Siege of Centauri — playable solo, no multiplayer required. Shares Strategy and Indie with Siege of Centauri.
The day has come… Humanity has been attacked by an alien race.You have space bases at your disposal. Use them to launch battleships and take over the alien mothership.
- 8
Stronghold 2: Steam Edition
Single-player alternative to Siege of Centauri — playable solo, no multiplayer required. Shares Strategy with Siege of Centauri.
Tax, torture or treat your peasants! Rehabilitate criminals or sentence them to death? Decide as you enjoy jousting over a lavish banquet, all while under siege from the warmongering Lord Barclay.
- 9
DG2: Defense Grid 2
Single-player alternative to Siege of Centauri — playable solo, no multiplayer required. Shares Strategy and Indie with Siege of Centauri.
Great strategy is timeless. Build, adapt, and defend across dynamic maps, solo or online - every session brings new strategies, new solutions, and new surprises. Now is the perfect time to enter the grid.
- 10
Warframe
Single-player alternative to Siege of Centauri — playable solo, no multiplayer required. Shares Action with Siege of Centauri.
Awaken as an unstoppable warrior and battle alongside your friends in this story-driven free-to-play online action game
- 11
Minecraft: Story Mode - A Telltale Games Series
Single-player alternative to Siege of Centauri — playable solo, no multiplayer required.
Episode 1 is now FREE - for a limited time! In Minecraft: Story Mode, playing as either a male or female hero named 'Jesse,' you’ll embark on a perilous adventure across the Overworld, through the Nether, to the End, and beyond.
- 12
Stardew Valley
Single-player alternative to Siege of Centauri — playable solo, no multiplayer required. Shares Indie with Siege of Centauri.
You've inherited your grandfather's old farm plot in Stardew Valley. Armed with hand-me-down tools and a few coins, you set out to begin your new life. Can you learn to live off the land and turn these overgrown fields into a thriving home?
- 13
Aircraft War
Single-player alternative to Siege of Centauri — playable solo, no multiplayer required. Shares Action and Indie with Siege of Centauri.
Fight against enemy planes with the fun Aircraft War! Challenge your friends with single and double player modes. Conquer the sky, enjoy the victory!
- 14
Command & Conquer™ Generals Zero Hour
Single-player alternative to Siege of Centauri — playable solo, no multiplayer required. Shares Action and Strategy with Siege of Centauri.
Command & Conquer Generals Zero Hour brings you closer to the enemy than ever before. Engage opposing forces at hot spots around the globe as you match strategies and arsenals against the new masterminds of modern war.
- 15
Ashes of the Singularity II
Single-player alternative to Siege of Centauri — playable solo, no multiplayer required. Shares Strategy with Siege of Centauri.
In this massive RTS game, command vast armies fighting for control of entire worlds. Control the forces of Earth, the mechanical AI Substrate, or the enigmatic Post-Human Coalition as you battle across the solar system in single player, cooperative multiplayer, or competitive multiplayer.
- 16
Sins of a Solar Empire®: Rebellion
Single-player alternative to Siege of Centauri — playable solo, no multiplayer required. Shares Action and Strategy with Siege of Centauri.
Command a space-faring empire in Sins of a Solar Empire: Rebellion, the new stand-alone expansion that combines 4X depth with real-time strategy gameplay.
- 17
Galactic Civilizations III
Single-player alternative to Siege of Centauri — playable solo, no multiplayer required. Shares Strategy with Siege of Centauri.
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.
- 18
Sins of a Solar Empire II
Single-player alternative to Siege of Centauri — playable solo, no multiplayer required. Shares Strategy with Siege of Centauri.
Battle for galactic dominance in this real-time 4X strategy game with unrivaled scale! You’ll explore, expand, exploit, and exterminate through military force, diplomacy, trade, culture, influence, and other underhanded tactics.
- 19
Ashes of the Singularity: Escalation
Single-player alternative to Siege of Centauri — playable solo, no multiplayer required. Shares Strategy with Siege of Centauri.
A massive-scale real-time strategy game where you command entire armies on a dynamic battlefield. Conquer multiple worlds across several single-player campaigns; or play with your friends in multiplayer combat.
- 20
Galactic Civilizations IV
Single-player alternative to Siege of Centauri — playable solo, no multiplayer required. Shares Strategy with Siege of Centauri.
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.
- 21
Star Control®: Origins
Single-player alternative to Siege of Centauri — playable solo, no multiplayer required. Shares Action with Siege of Centauri.
Star Control is a space role-playing game in which you command Earth's first interstellar starship on a mission to save the Earth from hostile alien empires.
- 22
Fallen Enchantress: Legendary Heroes
Single-player alternative to Siege of Centauri — playable solo, no multiplayer required. Shares Strategy and Indie with Siege of Centauri.
Fallen Enchantress is 4X strategy game from the makers of Sins of a Solar Empire and Galactic Civilizations. Build a civilization in the magical world of Elemental. Recruit heroes, train armies, build cities, forge alliances and save the world in this rich world where it's never the same game twice.
- 23
Galactic Civilizations® II: Ultimate Edition
Single-player alternative to Siege of Centauri — playable solo, no multiplayer required. Shares Strategy and Indie with Siege of Centauri.
Get the complete GalCiv II saga including Galactic Civilizations II: Dread Lords, the expansion pack Dark Avatar, and the newest expansion pack Twilight of the Arnor!