IMHO.

Single-player games like Colossal Citadels

Below are 8 single-player Steam games similar to Colossal Citadels, 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 Colossal Citadels page.

Ranked picks

  1. 1
    Rise of Realms — Steam game cover

    Rise of Realms

    Single-player alternative to Colossal Citadels — playable solo, no multiplayer required. Shares Strategy and Simulation with Colossal Citadels.

    Rise of Realms is a 4X RPG, for 1-6 players, in a medieval fantasy setting. Command an empire and recruit heroes to lead your armies. Use your tactical abilities to conquer the lands and reshape them in your image. Wishlist now.

    2026StrategySimulationRPGSingle-playerSimilar games →
  2. 2
    Dominions 6 - Rise of the Pantokrator — Steam game cover

    Dominions 6 - Rise of the Pantokrator

    Single-player alternative to Colossal Citadels — playable solo, no multiplayer required. Shares Strategy with Colossal Citadels.

    In Dominions 6 you take control of a powerful being that rules a nation and aspires to godhood. The type of Pretender Gods can vary from magically powerful arch mages to old dragons or an enormous tree. Dominions is a deep 4x turn based strategy game with a very large variety of spells and units.

    2024Strategy44.99 USDDeck PlayableSingle-playerSimilar games →
  3. 3
    Heroes of Science and Fiction — Steam game cover

    Heroes of Science and Fiction

    Single-player alternative to Colossal Citadels — playable solo, no multiplayer required. Shares Strategy and Indie with Colossal Citadels.

    A turn-based sci-fi strategy that combines exploration and exciting clashes on the battlefield. Take control over several different species, raise powerful armies for your heroes and destroy your opponents! This HoMM-like is set in a scifi universe, with new mechanics on top of the classic formula.

    2026StrategyIndieRPG14.99 USDDeck VerifiedSingle-playerSimilar games →
  4. 4
    Crucible Of Time — Steam game cover

    Crucible Of Time

    Single-player alternative to Colossal Citadels — playable solo, no multiplayer required. Shares Strategy and Indie with Colossal Citadels.

    A retro 4X game inspired by classic versions of the genre. Lead your people from a small nomadic tribe into a globe-spanning space-fairing civilization. Can your empire survive the Crucible Of Time?

    StrategyIndieSimulationSingle-playerSimilar games →
  5. 5
    Sarmatian Heroes — Steam game cover

    Sarmatian Heroes

    Single-player alternative to Colossal Citadels — playable solo, no multiplayer required. Shares Strategy and Indie with Colossal Citadels.

    Sarmatian Heroes is a turn-based strategy RPG where you explore the world, develop heroes, command armies, build fortified cities, and fight tactical battles on hex-based battlefields in an alternate-history setting.

    2027StrategyIndieRPGSingle-playerSimilar games →
  6. 6
    ZEPHON — Steam game cover

    ZEPHON

    Single-player alternative to Colossal Citadels — playable solo, no multiplayer required. Shares Strategy and RPG with Colossal Citadels.

    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?

    2024StrategyRPG39.99 USDDeck PlayableSingle-playerSimilar games →
  7. 7
    Rising Lords — Steam game cover

    Rising Lords

    Single-player alternative to Colossal Citadels — playable solo, no multiplayer required. Shares Strategy and Indie with Colossal Citadels.

    Rising Lords is a medieval turn-based strategy game with card and board game elements. Send your serfs to fight and die in your name... or let them prosper, and use them to your advantage!

    2024StrategyIndieSimulation19.99 USDDeck PlayableSingle-playerSimilar games →
  8. 8
    Sid Meier’s Civilization® VI — Steam game cover

    Sid Meier’s Civilization® VI

    Single-player alternative to Colossal Citadels — playable solo, no multiplayer required. Shares Strategy with Colossal Citadels.

    Expand your empire, advance your culture and go head-to-head against history’s greatest leaders. Will your civilization stand the test of time?

    2016Strategy5.99 USDDeck PlayableSingle-playerSimilar games →