Choose Osmos
Choose Osmos if it matches what drew you to this matchup. Osmos launched in 2009.
Osmos vs Lightfish
Osmos and Lightfish both land in Indie, 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 Indie, Casual on Steam. Osmos (2009) is 2 years older than Lightfish (2011). Lightfish scores higher on Steam reviews (92.7% positive) than Osmos (88.6% positive). 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 Lightfish
Choose Lightfish if you want an Action game with Steam Leaderboards. On Steam, it's currently about 50% cheaper on the Steam Store. Lightfish launched in 2011.
Both Osmos and Lightfish sit in Indie 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
 Osmos |  Lightfish | |
|---|---|---|
| Released | 2009 | 2011 |
| Genres | Indie, Casual | Action, Indie, Casual |
| Platforms | Windows, macOS, Linux | Windows |
| Steam Deck | Deck Playable | Unrated |
| Price | 9.99 USD | 4.99 USD |
| Steam reviews | 88.6% positive (403 reviews) | 92.7% positive (55 reviews) |
| Multiplayer | Single-player only | Single-player only |
| Developers | Hemisphere Games | Eclipse Games |
Side by side
- Both share Indie, Casual on Steam.
- Osmos (2009) is 2 years older than Lightfish (2011).
- Lightfish scores higher on Steam reviews (92.7% positive) than Osmos (88.6% positive).
- Lightfish is currently ~50% cheaper on Steam than Osmos (4.99 USD vs. 9.99 USD).
- Osmos is Deck Playable on Steam Deck; Lightfish has no Deck rating yet.
Osmos vs Lightfish — FAQ
- Should I play Osmos or Lightfish first?
- If you want chronology, Osmos (2009) came out before Lightfish (2011). 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 Osmos and Lightfish similar?
- They overlap on Indie, 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 Osmos run on Steam Deck?
- Yes — Osmos is rated Deck Playable by Valve. Lightfish doesn't have a Deck rating yet, so its Deck behaviour is currently unverified.