Choose The Deep
Choose The Deep if you want an Indie experience. On Steam, it's a focused single-player run rather than a multiplayer commitment.
The Deep vs Project Castaway
The Deep and Project Castaway both land in RPG, Casual 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 RPG, Casual on Steam. Project Castaway has co-op; The Deep does not. Project Castaway is Deck Unsupported on Steam Deck; The Deep has no Deck rating yet. 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 Project Castaway
Choose Project Castaway if you want an Action and Adventure game with Multi-player, Online Co-op, and Co-op. On Steam, it has co-op, so you can bring a friend. 1,023 Steam reviews back the pick.
Both The Deep and Project Castaway sit in RPG and Casual 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
 The Deep |  Project Castaway | |
|---|---|---|
| Released | — | 2026 |
| Genres | Indie, RPG, Casual | Action, Adventure, RPG, Casual |
| Platforms | Windows | Windows, Linux |
| Steam Deck | Unrated | Deck Unsupported |
| Price | Price unknown | 10.99 USD |
| Steam reviews | — | 68.3% positive (1,023 reviews) |
| Multiplayer | Single-player only | Multi-player, Online Co-op, Co-op |
| Developers | Miguel Roman, Yasmany Roman | Mardonpol Inc. |
Side by side
- Both share RPG, Casual on Steam.
- Project Castaway has co-op; The Deep does not.
- Project Castaway is Deck Unsupported on Steam Deck; The Deep has no Deck rating yet.
The Deep vs Project Castaway — FAQ
- Are The Deep and Project Castaway similar?
- They overlap on RPG, Casual 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 The Deep have multiplayer like Project Castaway?
- No. Project Castaway supports multiplayer on Steam (Multi-player, Online Co-op, Co-op), while The Deep is listed as single-player only.