Choose Girl Genius: Adventures In Castle Heterodyne
Choose Girl Genius: Adventures In Castle Heterodyne if it's Steam Deck Verified, so handheld play works out of the box. Girl Genius: Adventures In Castle Heterodyne launched in 2023.
Girl Genius: Adventures In Castle Heterodyne vs Covenant: Project Zero
Girl Genius: Adventures In Castle Heterodyne and Covenant: Project Zero both land in Action, Adventure 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 on Steam. Both released in 2023. Covenant: Project Zero is currently ~87% cheaper on Steam than Girl Genius: Adventures In Castle Heterodyne (3.99 USD vs. 29.99 USD). 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 Covenant: Project Zero
Choose Covenant: Project Zero if you want an Indie experience. On Steam, it's currently about 87% cheaper on the Steam Store. Covenant: Project Zero launched in 2023.
Both Girl Genius: Adventures In Castle Heterodyne and Covenant: Project Zero sit in Action and Adventure on Steam, 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
 Girl Genius: Adventures In Castle Heterodyne |  Covenant: Project Zero | |
|---|---|---|
| Released | 2023 | 2023 |
| Genres | Action, Adventure | Action, Indie, Adventure |
| Platforms | Windows, macOS, Linux | Windows, macOS |
| Steam Deck | Deck Verified | Unrated |
| Price | 29.99 USD | 3.99 USD |
| Steam reviews | 87% positive (54 reviews) | 8 reviews |
| Multiplayer | Single-player only | Single-player only |
| Developers | Rain Games | 11000AD |
Side by side
- Both share Action, Adventure on Steam.
- Both released in 2023.
- Covenant: Project Zero is currently ~87% cheaper on Steam than Girl Genius: Adventures In Castle Heterodyne (3.99 USD vs. 29.99 USD).
- Girl Genius: Adventures In Castle Heterodyne is Deck Verified on Steam Deck; Covenant: Project Zero has no Deck rating yet.
Girl Genius: Adventures In Castle Heterodyne vs Covenant: Project Zero — FAQ
- Are Girl Genius: Adventures In Castle Heterodyne and Covenant: Project Zero similar?
- They overlap on Action, Adventure 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.
- Does Girl Genius: Adventures In Castle Heterodyne run on Steam Deck?
- Yes — Girl Genius: Adventures In Castle Heterodyne is rated Deck Verified by Valve. Covenant: Project Zero doesn't have a Deck rating yet, so its Deck behaviour is currently unverified.