IMHO.

Games like Harmonic Catastrophe

If Harmonic Catastrophe is your kind of game, the closest matches are Ys VIII: Lacrimosa of DANA, Salt and Sacrifice and Dungeons of Sundaria — 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 Harmonic Catastrophe: Harmonic Catastrophe is a story-rich action RPG where you rescue sacred creatures called Astras. You will forge unbreakable bonds, unleash devastating combat skills and will be joined by different Oathbound through a world where the last light of creation is dying. You are its only chance.

ActionAdventureRPGFree To PlayFree to playWindowsby Splinternova
Harmonic Catastrophe — Steam game cover

Players who liked Harmonic Catastrophe also play

Steam players who put hours into Harmonic Catastrophe 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. Ys VIII: Lacrimosa of DANA

    WHY THIS

    Top pick for Harmonic Catastrophe fans by collaborative filtering across millions of Steam libraries. Shares Action and RPG with Harmonic Catastrophe.

    Ys returns with a brand new adventure for the first time in 8 years! Adol awakens shipwrecked and stranded on a cursed island. There, he and the other shipwrecked passengers he rescues form a village to challenge fearsome beasts and mysterious ruins on the isolated island.

    2018ActionRPG19.99 USDDeck VerifiedSteam ↗
  2. Salt and Sacrifice

    WHY THIS

    Second-strongest match for Harmonic Catastrophe fans by collaborative filtering across millions of Steam libraries. Shares Action and RPG with Harmonic Catastrophe.

    Join your fellow Marked Inquisitors in this online coop successor to award-winning 2016 Soulslike Salt and Sanctuary.

    2023ActionRPG19.99 USDDeck VerifiedSteam ↗
  3. Dungeons of Sundaria

    WHY THIS

    Third-strongest match for Harmonic Catastrophe fans by collaborative filtering across millions of Steam libraries. Shares Action and Adventure with Harmonic Catastrophe.

    Adventure through epic dungeons facing fearsome creatures either solo or with a group of friends. Master your class, loot everything, and destroy the foul creatures of the deep! Will you become a hero of legend?

    2023ActionIndieAdventure9.99 USDDeck PlayableSteam ↗
  4. Two Worlds Epic Edition

    WHY THIS

    Ranked #4 for Harmonic Catastrophe fans by collaborative filtering across millions of Steam libraries. Shares RPG with Harmonic Catastrophe.

    ... 300 years after Aziraal has been banished, a brother and sister are drawn into the conflict which has flared up between the Orcs and the free world. Kyra, the hero's younger sister, suddenly disappears in mysterious circumstances.«...If my family really belongs to the chosen ones, why then have we always been as poor as church mice?

    2009RPG14.99 USDDeck PlayableSteam ↗
  5. Tales of Berseria™

    WHY THIS

    Ranked #5 for Harmonic Catastrophe fans by collaborative filtering across millions of Steam libraries. Shares Action and RPG with Harmonic Catastrophe.

    Players embark on a journey of self-discovery as they assume the role of Velvet, a young woman whose once kind demeanor has been replaced and overcome with a festering anger and hatred after a traumatic experience three years prior to the events within Tales of Berseria.

    2017ActionRPG49.99 USDSteam ↗
  6. Cat Quest II

    WHY THIS

    Ranked #6 for Harmonic Catastrophe fans by collaborative filtering across millions of Steam libraries. Shares Action and Adventure with Harmonic Catastrophe.

    Open-world action-RPG in a fantasy realm of cats and dogs. Sequel to the award-winning original, CAT QUEST II lets you play solo or with a friend, as both a cat and dog! Quest in a world filled with magic, defeat monsters and collect loot in a catventure like never before!

    2019ActionIndieAdventure14.99 USDDeck VerifiedSteam ↗
  7. Two Worlds II HD

    WHY THIS

    Ranked #7 for Harmonic Catastrophe fans by collaborative filtering across millions of Steam libraries. Shares RPG with Harmonic Catastrophe.

    Check out the new Velvet Edition bundle including both Two Worlds II and Pirates of the Flying Fortress DLC.

    2011RPG24.99 USDSteam ↗
  8. Coridden

    WHY THIS

    Ranked #8 for Harmonic Catastrophe fans by collaborative filtering across millions of Steam libraries. Shares Action and Adventure with Harmonic Catastrophe.

    Become the ultimate shapeshifter in this hack n’ slash ARPG with action-based combat. Transform seamlessly and customize both your human and beast powers as you level up, find new gear and DNA-strands. Venture out solo or in co-op to uncover the secrets sealed inside a legendary city.

    2025ActionIndieAdventure11.99 USDDeck VerifiedSteam ↗

Plays great on Steam Deck

Valve-Verified or Playable picks from the similar pool — ready to go on Deck out of the box.

  1. Ys VIII: Lacrimosa of DANA

    WHY THIS

    Deck Verified — runs on Steam Deck out of the box. Shares Action and RPG with Harmonic Catastrophe.

    Ys returns with a brand new adventure for the first time in 8 years! Adol awakens shipwrecked and stranded on a cursed island. There, he and the other shipwrecked passengers he rescues form a village to challenge fearsome beasts and mysterious ruins on the isolated island.

    2018ActionRPG19.99 USDDeck VerifiedSteam ↗
  2. Salt and Sacrifice

    WHY THIS

    Deck Verified — runs on Steam Deck out of the box. Shares Action and RPG with Harmonic Catastrophe.

    Join your fellow Marked Inquisitors in this online coop successor to award-winning 2016 Soulslike Salt and Sanctuary.

    2023ActionRPG19.99 USDDeck VerifiedSteam ↗
  3. Cat Quest II

    WHY THIS

    Deck Verified — runs on Steam Deck out of the box. Shares Action and Adventure with Harmonic Catastrophe.

    Open-world action-RPG in a fantasy realm of cats and dogs. Sequel to the award-winning original, CAT QUEST II lets you play solo or with a friend, as both a cat and dog! Quest in a world filled with magic, defeat monsters and collect loot in a catventure like never before!

    2019ActionIndieAdventure14.99 USDDeck VerifiedSteam ↗
  4. Coridden

    WHY THIS

    Deck Verified — runs on Steam Deck out of the box. Shares Action and Adventure with Harmonic Catastrophe.

    Become the ultimate shapeshifter in this hack n’ slash ARPG with action-based combat. Transform seamlessly and customize both your human and beast powers as you level up, find new gear and DNA-strands. Venture out solo or in co-op to uncover the secrets sealed inside a legendary city.

    2025ActionIndieAdventure11.99 USDDeck VerifiedSteam ↗

Frequently asked about Harmonic Catastrophe

Is Harmonic Catastrophe free to play?
Yes — Harmonic Catastrophe 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 Harmonic Catastrophe have multiplayer or co-op?
Yes — Harmonic Catastrophe supports multi-player play according to its Steam store listing (Multi-player, Cross-Platform Multiplayer, Online Co-op).
What games are most similar to Harmonic Catastrophe?
Based on Steam play patterns and shared genres/tags, the games most often recommended alongside Harmonic Catastrophe are Ys VIII: Lacrimosa of DANA, Salt and Sacrifice, Dungeons of Sundaria.
Who developed Harmonic Catastrophe?
Harmonic Catastrophe was developed by Splinternova.

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 Harmonic Catastrophe.

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