IMHO.

Games like Citadel Zero

If Citadel Zero is your kind of game, the closest matches are Battle Waves: Card Tactics, Soulreign and Magma Karta — picked from the ranked list below. Each pick is ranked by what players of this game also play, shared genres and tags, and review-mined similarity — not a generic popularity list.

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About Citadel Zero: Defend the last citadel on a dying alien world. Summon a gacha collection of bio-engineered defense towers, forge a custom loadout, and conquer three modes, story-driven Chronicle, roguelite Contracts, and 1v1 PvP Ascension. Tower defense meets deck-building meta-progression.

2026StrategyIndieFree To PlayFree to playWindowsby PYRHAMID Studio
Citadel Zero — Steam game cover

Players who liked Citadel Zero also play

Steam players who put hours into Citadel Zero also tend to own these titles — a signal called collaborative filtering. imho.run cross-references millions of library ownership patterns to surface games whose real audiences overlap, regardless of whether their genre tags match.

  1. Battle Waves: Card Tactics

    WHY THIS

    Top pick for Citadel Zero fans by collaborative filtering across millions of Steam libraries. Shares Strategy and Indie with Citadel Zero.

    A fast-paced Card Battler with Tower Defense action! Claim victory in the Roguelite Deckbuilder campaign and Online Multiplayer. Collect all the factions to explore thousands of strategic combinations.

    2024ActionStrategyIndie3.89 USDSteam ↗
  2. Soulreign

    WHY THIS

    Second-strongest match for Citadel Zero fans by collaborative filtering across millions of Steam libraries. Shares Strategy with Citadel Zero.

    An indie soul-collector online RPG with inventory based auto-combat in the Backpack Battles lineage. Find and bind legendary souls, arrange their item grid, then watch the team fight. 10 regions, a roguelite Descent, ranked PvP. Buy once, no pay-to-win. Join now and shape the future of the game!

    2026StrategyRPGEarly AccessSteam ↗
  3. Magma Karta

    WHY THIS

    Third-strongest match for Citadel Zero fans by collaborative filtering across millions of Steam libraries. Shares Strategy and Indie with Citadel Zero.

    Magma Karta is a satisfying strategy card game with roguelite and gambling elements. The rules can switch at any turn, challenging you to adapt your builds and your playstyle.

    StrategyIndieCasualSteam ↗
  4. Agestan

    WHY THIS

    Ranked #4 for Citadel Zero fans by collaborative filtering across millions of Steam libraries. Shares Strategy and Indie with Citadel Zero.

    Build your base in Agestan, form your army with cards, and crush your rivals. Conquer all lands solo or clash with a friend in PvP... Choose a blind spot, fire the catapult, and destroy their base. Remember: you can only see each other on the battlefield!

    2026StrategyIndieRPG9.99 USDSteam ↗
  5. Tower Arena Survive

    WHY THIS

    Ranked #5 for Citadel Zero fans by collaborative filtering across millions of Steam libraries. Shares Strategy and Indie with Citadel Zero.

    Tower Arena Survive (TAS) is a dynamic mix of roguelike and tower defense, where your castle becomes an impregnable fortress. Use 80+ weapons and 88 upgrades to balance income, damage, and defense against up to 7 foes. Buy monsters to disrupt enemy waves and change the tide of battle!

    2025StrategyIndie4.99 USDSteam ↗
  6. Septar

    WHY THIS

    Ranked #6 for Citadel Zero fans by collaborative filtering across millions of Steam libraries. Shares Strategy and Indie with Citadel Zero.

    Build scoring chains from a Romanian folk deck, weaponize the wild 7, and bend the rules with 59 relics as you out-race a gauntlet of folkloric opponents — the last of them Death. Sculpt your deck, pick a character, climb the Ascension ladder. Plus a friend-invite 1v1 best-of-5 series.

    StrategyIndieCasualSteam ↗
  7. Tower Lab

    WHY THIS

    Ranked #7 for Citadel Zero fans by collaborative filtering across millions of Steam libraries. Shares Strategy and Indie with Citadel Zero.

    Physics-based TD where enemies have no health, push them off instead! Build devastating tower combos that push, pull, and launch enemies. Unlock cards, upgrade towers, discover broken synergies, and dominate through creative strategies.

    2026StrategyIndieSimulationSteam ↗
  8. Tower Survivors

    WHY THIS

    Ranked #8 for Citadel Zero fans by collaborative filtering across millions of Steam libraries. Shares Strategy and Indie with Citadel Zero.

    'Tower Survivors' is a dark fantasy survival RTS where you must survive, upgrade and defend humanity against massive unending armies from Anubis Tomb, Jurassic Valley and Vampire Monastery. Set in three different empires hell-bent on your destruction, it’s not if you can survive, but how long.

    ActionStrategyIndieSteam ↗

Frequently asked about Citadel Zero

Is Citadel Zero free to play?
Yes — Citadel Zero is a free-to-play title on Steam. You can install and play it without buying anything, though some games include optional in-app purchases.
Does Citadel Zero have multiplayer or co-op?
Yes — Citadel Zero supports multi-player play according to its Steam store listing (Multi-player, Online PvP, PvP).
What games are most similar to Citadel Zero?
Based on Steam play patterns and shared genres/tags, the games most often recommended alongside Citadel Zero are Battle Waves: Card Tactics, Soulreign, Magma Karta.
Who developed Citadel Zero?
Citadel Zero was developed by PYRHAMID Studio and published by PYRHAMID.

imho.run ranks Steam game alternatives using a mix of collaborative filtering (ALS / iALS / EASE / LightGCN), content scoring over genres, categories, Steam tags, developers, and publishers, plus AI-extracted vibes mined from review text. The page above is generated in seed mode anchored on Citadel Zero.

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