Choose Oppcium
Choose Oppcium if it's currently about 60% cheaper on the Steam Store. Oppcium launched in 2021.
Oppcium vs Species: Unknown
Oppcium and Species: Unknown both land in Action, Indie 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 on Steam. Oppcium (2021) is 4 years older than Species: Unknown (2025). Oppcium is currently ~60% cheaper on Steam than Species: Unknown (3.99 USD vs. 9.99 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 Species: Unknown
Choose Species: Unknown if you want an Early Access game with Multi-player, Online Co-op, and Co-op. On Steam, it's the newer release (2025) and ships with the modern feature baseline. 3,668 Steam reviews back the pick.
Both Oppcium and Species: Unknown sit in Action and Indie 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
 Oppcium |  Species: Unknown | |
|---|---|---|
| Released | 2021 | 2025 |
| Genres | Action, Indie | Action, Indie, Early Access |
| Platforms | Windows | Windows |
| Steam Deck | Unrated | Deck Unsupported |
| Price | 3.99 USD | 9.99 USD |
| Steam reviews | 2 reviews | 95.1% positive (3,668 reviews) |
| Multiplayer | Single-player only | Multi-player, Online Co-op, Co-op |
| Developers | Yaketsuku Mikami | WanadevStudio |
Side by side
- Both share Action, Indie on Steam.
- Oppcium (2021) is 4 years older than Species: Unknown (2025).
- Oppcium is currently ~60% cheaper on Steam than Species: Unknown (3.99 USD vs. 9.99 USD).
- Species: Unknown has co-op; Oppcium does not.
- Species: Unknown is Deck Unsupported on Steam Deck; Oppcium has no Deck rating yet.
Oppcium vs Species: Unknown — FAQ
- Should I play Oppcium or Species: Unknown first?
- If you want chronology, Oppcium (2021) came out before Species: Unknown (2025). 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 Oppcium and Species: Unknown similar?
- They overlap on Action, Indie 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 Oppcium have multiplayer like Species: Unknown?
- No. Species: Unknown supports multiplayer on Steam (Multi-player, Online Co-op, Co-op), while Oppcium is listed as single-player only.