Single-player games like Space Colony: Steam Edition
Below are 17 single-player Steam games similar to Space Colony: Steam Edition, 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 Space Colony: Steam Edition page.
Ranked picks
- 1
The Spatials: Galactology
Single-player alternative to Space Colony: Steam Edition — playable solo, no multiplayer required. Shares Strategy and Simulation with Space Colony: Steam Edition.
The Spatials are back with Galactology! Design, build and protect your colony station from the many enemies you will make while exploring the galaxy and exploding their homeworlds.
- 2
Stronghold Legends: Steam Edition
Single-player alternative to Space Colony: Steam Edition — playable solo, no multiplayer required. Shares Strategy and Simulation with Space Colony: Steam Edition.
Catapult werewolves over castle walls, incinerate troops with dragon fire and command the Knights of the Round Table! This remaster of the mythical ‘castle sim’ features Steam multiplayer, Workshop support, new maps, achievements and DLC campaigns.
- 3
Solargene
Single-player alternative to Space Colony: Steam Edition — playable solo, no multiplayer required. Shares Strategy and Simulation with Space Colony: Steam Edition.
Take Command of a Space Corporation in the Sci-Fi Simulator Solargene! Manage personnel, design and develop colonies and orbital stations across the solar system! Mine resources, establish logistics, research cutting-edge technologies, trade, and complete missions
- 4
Stronghold: Definitive Edition
Single-player alternative to Space Colony: Steam Edition — playable solo, no multiplayer required. Shares Strategy and Simulation with Space Colony: Steam Edition.
Greetings sire! Your stronghold awaits you. Build a castle economy, besiege unforgettable villains and return to the 'castle sim' that started it all. Experience this classic RTS with upgraded visuals, modernised gameplay, Steam multiplayer and a new campaign.
- 5
Stronghold HD (2012)
Single-player alternative to Space Colony: Steam Edition — playable solo, no multiplayer required. Shares Strategy and Simulation with Space Colony: Steam Edition.
The original castle sim, Stronghold HD allows you to design, build and destroy historical castles. Engage in medieval warfare against the AI in one of two single player campaigns or online with up to 8 players.
- 6
Surviving Mars
Single-player alternative to Space Colony: Steam Edition — playable solo, no multiplayer required. Shares Strategy and Simulation with Space Colony: Steam Edition.
There will be challenges to overcome. Execute your strategy and improve your colony’s chances of survival while unlocking the mysteries of this alien world. Are you ready? Mars is waiting for you.
- 7
Stronghold 2: Steam Edition
Single-player alternative to Space Colony: Steam Edition — playable solo, no multiplayer required. Shares Strategy and Simulation with Space Colony: Steam Edition.
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.
- 8
Stronghold Crusader HD (2012)
Single-player alternative to Space Colony: Steam Edition — playable solo, no multiplayer required. Shares Strategy and Simulation with Space Colony: Steam Edition.
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.
- 9
Stardew Valley
Single-player alternative to Space Colony: Steam Edition — playable solo, no multiplayer required. Shares Simulation with Space Colony: Steam Edition.
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?
- 10
Caesar™ 3
Single-player alternative to Space Colony: Steam Edition — playable solo, no multiplayer required. Shares Strategy and Simulation with Space Colony: Steam Edition.
Prove your strength of mind and spirit and you just may be crowned Caesar!
- 11
Caesar™ IV
Single-player alternative to Space Colony: Steam Edition — playable solo, no multiplayer required. Shares Strategy and Simulation with Space Colony: Steam Edition.
Starting as governor of a newly formed province in the Roman Empire your goal is simple: advance up the empire's political ladder to become the next Caesar.
- 12
The Sims™ 4
Single-player alternative to Space Colony: Steam Edition — playable solo, no multiplayer required. Shares Simulation with Space Colony: Steam Edition.
Play with life and discover the possibilities. Unleash your imagination and create a world of Sims that’s wholly unique. Explore and customize every detail from Sims to homes–and much more.
- 13
The Sims™ Legacy Collection
Single-player alternative to Space Colony: Steam Edition — playable solo, no multiplayer required. Shares Simulation with Space Colony: Steam Edition.
The original game you know and love. For Windows 10/11. Create a neighborhood of Sims and guide their lives through careers and romance. Or create chaos with open-ended gameplay that lets you shape their destinies.
- 14
Stronghold Crusader 2
Single-player alternative to Space Colony: Steam Edition — playable solo, no multiplayer required. Shares Strategy and Simulation with Space Colony: Steam Edition.
Stronghold Crusader 2 is the long awaited sequel to the original castle sim. After 12 years Stronghold returns to the desert with a new 3D engine and powerful Havok Physics. Crusader 2 recaptures the original game’s addictive, fast-paced gameplay and authentic castle simulation.
- 15
Stronghold Crusader: Definitive Edition
Single-player alternative to Space Colony: Steam Edition — playable solo, no multiplayer required. Shares Strategy and Simulation with Space Colony: Steam Edition.
Gird your loins and sharpen your steel! Besiege 20 unique enemy lords and battle friends online, in this expanded remaster of the classic 'castle sim'. Relive history with new units, opponents, visuals, audio, campaigns, skirmish trails, co-op and larger maps.
- 16
Stronghold: Warlords
Single-player alternative to Space Colony: Steam Edition — playable solo, no multiplayer required. Shares Strategy and Simulation with Space Colony: Steam Edition.
Besiege Great Khans, Imperial warlords and Shōgun commanders in Stronghold: Warlords, the latest 'castle sim' from Firefly Studios. Command AI warlords across the battlefield as you build a castle economy and new gunpowder-fuelled siege engines!
- 17
Stronghold 3 Gold
Single-player alternative to Space Colony: Steam Edition — playable solo, no multiplayer required. Shares Strategy and Simulation with Space Colony: Steam Edition.
Set 10 years after the original, Stronghold 3: Gold follows the vengeful story of The Wolf in the third installment of the award-winning castle building series. The Wolf has cheated death become even more bitter and twisted. Build castles, rally your troops and save medieval England!