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: Invasion
Deep Space and Unknown Signal: Invasion 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: Invasion (2024). Deep Space is currently ~90% cheaper on Steam than Unknown Signal: Invasion (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: Invasion
Choose Unknown Signal: Invasion if it's the newer release (2024) and ships with the modern feature baseline. Unknown Signal: Invasion launched in 2024.
Both Deep Space and Unknown Signal: Invasion 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: Invasion | |
|---|---|---|
| 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) | 7 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: Invasion (2024).
- Deep Space is currently ~90% cheaper on Steam than Unknown Signal: Invasion (3.99 USD vs. 39.99 USD).
Deep Space vs Unknown Signal: Invasion — FAQ
- Should I play Deep Space or Unknown Signal: Invasion first?
- If you want chronology, Deep Space (2020) came out before Unknown Signal: Invasion (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: Invasion 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.