IMHO.

Games like Zero Castle

If Zero Castle is your kind of game, the closest matches are Blast Horizon, INSPACE 2980 and SPACEFIGHTER - The Bullet Hell — 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 Zero Castle: Take control of a unique flying castle, destroy enemy forces, build your playstyle with powerful upgrades, and survive every cycle.

ActionIndieWindowsby Solodevdo
Zero Castle — Steam game cover

Players who liked Zero Castle also play

Steam players who put hours into Zero Castle 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. Blast Horizon

    WHY THIS

    Top pick for Zero Castle fans by collaborative filtering across millions of Steam libraries. Shares Action with Zero Castle.

    The Screen Belongs to your Enemy - Take it Back!In this classic Shmup, you will fight through impossible odds against hostiles flooding the battlefield from every direction. Every second is a test of positioning and precision while turning the battlefield into a storm of explosions.

    2026Action9.74 USDSteam ↗
  2. INSPACE 2980

    WHY THIS

    Second-strongest match for Zero Castle fans by collaborative filtering across millions of Steam libraries. Shares Action and Indie with Zero Castle.

    INSPACE 2980 is a stylish and dynamic SHMUP from the 16-bit era of games consoles and arcade machines. Take part in an exciting adventure and save the galaxy! Once again!

    2018ActionIndieAdventure2.99 USDSteam ↗
  3. SPACEFIGHTER - The Bullet Hell

    WHY THIS

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

    Vampire Survivors meets bullet hell — in space. Pilot a 2D starship, fuse weapon branches into broken builds, and survive waves of bullets and bosses with real mechanics. Solo dev project.

    2026ActionStrategyIndie2.39 USDSteam ↗
  4. Incrementalism: Paper Space

    WHY THIS

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

    A run based shooter drawn on lined paper. Fly a paper ship across a desk, collect what you can before the fuel runs out, then spend it and go again. Five worlds, five currencies, and rules that rewrite themselves.

    2026ActionIndieCasualSteam ↗
  5. Alpha Star

    WHY THIS

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

    "Survive the crushing gravity and conquer the void! Alpha Star is a fast-paced 2D space shooter where you must navigate through evolving bullet hells and dynamic black holes. Upgrade your ship, survive 10 intense mission phases, and reach the heart of the Singularity."

    2026ActionIndie4.99 USDSteam ↗
  6. Void Wars

    WHY THIS

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

    Dodge, shoot and free the galaxy of the evil space mega corp. Use a variety of different weapons and spaceships, each with different playstyles to overcome many challenging levels.

    2024ActionIndie5.99 USDSteam ↗
  7. Cosmic Warlock

    WHY THIS

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

    Wield the power of the stars in this intense multi directional shmup.

    ActionIndieSteam ↗
  8. DRUM'N'BASS MASSACRE

    WHY THIS

    Ranked #8 for Zero Castle fans by collaborative filtering across millions of Steam libraries. Shares Action with Zero Castle.

    DRUM'N'BASS MASSACRE is a high-velocity aerial combat shooter where you destoy your enemies while performing unimaginable maneuvers using your interstellar interceptor, accompanied by original drum and bass soundtrack

    2021ActionCasual0.99 USDSteam ↗

Free alternatives

Free-to-play games that recommended players of this title also tend to enjoy.

  1. Sheepy: A Short Adventure

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie with Zero Castle.

    A Short Handcrafted Pixel Art Platformer that follows Sheepy, an abandoned plushy brought to life. Sheepy: A Short Adventure is the first short game from MrSuicideSheep.

    2024IndieAdventureFree To PlayFreeDeck PlayableSteam ↗
  2. Awaria

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Indie with Zero Castle.

    Awaria is a short game about working in haunted maintenance tunnels.

    2024ActionIndieFree To PlayFreeDeck PlayableSteam ↗
  3. Grimm's Hollow

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie with Zero Castle.

    A spooky, freeware RPG where you search the afterlife for your brother. Reap ghosts with your scythe, explore haunted caves, and eat ghostly treats on your journey through death.

    2019IndieAdventureRPGFreeDeck PlayableSteam ↗
  4. The Expendabros

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Indie with Zero Castle.

    The Expendabros have assembled and set their sights on the forces of ruthless arms dealer Conrad Stonebanks in the forests of Eastern Europe.

    2014ActionIndieAdventureFreeDeck VerifiedSteam ↗
  5. Iron Snout

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Indie with Zero Castle.

    Iron Snout is a fast, colorful and brutal fighting game in which you will be helping a piglet fight for its life against hordes of wolves.

    2016ActionIndieFree To PlayFreeDeck PlayableSteam ↗
  6. UNBEATABLE [white label]

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Indie with Zero Castle.

    A young girl learns a song. An exclusive side-story set in the world of D-CELL GAMES' upcoming rhythm-adventure.

    2021ActionIndieAdventureFreeDeck PlayableSteam ↗
  7. Star Fetchers

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Indie with Zero Castle.

    The introduction to a wild ride with gangsters and deep state conspiracy theories

    2020ActionIndieAdventureFreeDeck PlayableSteam ↗
  8. Magic Archery

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie with Zero Castle.

    Train a commoner to become the greatest archer in this short incremental game! Increase your stats, gather wealth from quests, buy upgrades, and infuse your arrows with magic.

    2024IndieSimulationRPGFreeDeck PlayableSteam ↗

Frequently asked about Zero Castle

What games are most similar to Zero Castle?
Based on Steam play patterns and shared genres/tags, the games most often recommended alongside Zero Castle are Blast Horizon, INSPACE 2980, SPACEFIGHTER - The Bullet Hell.
Who developed Zero Castle?
Zero Castle was developed by Solodevdo.

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 Zero Castle.

For library-aware picks tuned to your specific taste, sign in with Steam on the home page.