Choose Cat Quest II
Choose Cat Quest II if you want an Indie experience. On Steam, it's Steam Deck Verified, so handheld play works out of the box. 1,955 Steam reviews back the pick.
Cat Quest II vs Harmonic Catastrophe
Cat Quest II and Harmonic Catastrophe both land in Action, Adventure, RPG on Steam, which is why they keep getting compared. The comparison below is built from each game's Steam metadata — release year, genres, categories, Steam Deck status, price, and review score — refreshed daily by imho.run's scraper. Headline differences: Both share Action, Adventure, RPG on Steam. Harmonic Catastrophe is free; Cat Quest II is paid (14.99 USD). Both support cooperative play. No login or purchase needed — scroll for the full table, the verdict FAQ, and links to ranked similar games for both titles.
Which should you pick?
Choose Harmonic Catastrophe
Choose Harmonic Catastrophe if you want a Free To Play game with Online Co-op. On Steam, it's free to play, so the barrier to trying it is zero.
Both Cat Quest II and Harmonic Catastrophe sit in Action, Adventure, and RPG on Steam and both list Multi-player, Shared/Split Screen, and Shared/Split Screen Co-op, so either pick lands in the same broad neighborhood. Use the side-by-side table for the feature view, or follow the "Games like" links below to see ranked alternatives for either title.
Side-by-side comparison
 Cat Quest II |  Harmonic Catastrophe | |
|---|---|---|
| Released | 2019 | — |
| Genres | Action, Indie, Adventure, RPG | Action, Adventure, RPG, Free To Play |
| Platforms | Windows, macOS | Windows |
| Steam Deck | Deck Verified | Unrated |
| Price | 14.99 USD | Free to play |
| Steam reviews | 94.8% positive (1,955 reviews) | — |
| Multiplayer | Multi-player, Shared/Split Screen Co-op, Co-op | Multi-player, Cross-Platform Multiplayer, Online Co-op |
| Developers | The Gentlebros | Splinternova |
Side by side
- Both share Action, Adventure, RPG on Steam.
- Harmonic Catastrophe is free; Cat Quest II is paid (14.99 USD).
- Both support cooperative play.
- Cat Quest II is Deck Verified on Steam Deck; Harmonic Catastrophe has no Deck rating yet.
Cat Quest II vs Harmonic Catastrophe — FAQ
- Are Cat Quest II and Harmonic Catastrophe similar?
- They overlap on Action, Adventure, RPG on Steam, so the catalogue groups them together — but "similar" depends on the specific mechanics. Use the genre + category rows above to decide whether the overlap matches what drew you to the one you've already played.
- Do both Cat Quest II and Harmonic Catastrophe have co-op?
- Yes — both list a co-op category on Steam. Specifics differ: Cat Quest II ships Shared/Split Screen Co-op, Co-op; Harmonic Catastrophe ships Online Co-op, Shared/Split Screen Co-op.
- Is Harmonic Catastrophe free?
- Yes — Harmonic Catastrophe is a free-to-play Steam title. Cat Quest II is paid (14.99 USD).
- Does Cat Quest II run on Steam Deck?
- Yes — Cat Quest II is rated Deck Verified by Valve. Harmonic Catastrophe doesn't have a Deck rating yet, so its Deck behaviour is currently unverified.