Choose Deep Space
Choose Deep Space if you want a RPG experience. On Steam, it's currently about 90% cheaper on the Steam Store. Deep Space launched in 2020.
Deep Space vs Unknown Signal
Deep Space and Unknown Signal both land in Action, Indie, 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, Indie, Adventure on Steam. Deep Space (2020) is 4 years older than Unknown Signal (2024). Deep Space is currently ~90% cheaper on Steam than Unknown Signal (3.99 USD vs. 39.99 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 Unknown Signal
Choose Unknown Signal if it's the newer release (2024) and ships with the modern feature baseline. Unknown Signal launched in 2024.
Both Deep Space and Unknown Signal sit in Action, Indie, 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
 Deep Space |  Unknown Signal | |
|---|---|---|
| Released | 2020 | 2024 |
| Genres | Action, Indie, Adventure, RPG, Casual | Action, Indie, Adventure, Casual |
| Platforms | Windows | Windows |
| Steam Deck | Unrated | Unrated |
| Price | 3.99 USD | 39.99 USD |
| Steam reviews | 59.3% positive (118 reviews) | 8 reviews |
| Multiplayer | Single-player only | Single-player only |
| Developers | Axe Games | Daniel Li |
Side by side
- Both share Action, Indie, Adventure on Steam.
- Deep Space (2020) is 4 years older than Unknown Signal (2024).
- Deep Space is currently ~90% cheaper on Steam than Unknown Signal (3.99 USD vs. 39.99 USD).
Deep Space vs Unknown Signal — FAQ
- Should I play Deep Space or Unknown Signal first?
- If you want chronology, Deep Space (2020) came out before Unknown Signal (2024). If neither is a sequel to the other, order doesn't really matter — start with whichever fits your current mood, since both share enough on Steam to make either a reasonable opener.
- Are Deep Space and Unknown Signal similar?
- They overlap on Action, Indie, 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.