Choose S.U.B.
Choose S.U.B. if you want an Adventure and Casual experience. S.U.B. launched in 2018.
S.U.B. vs Aquarius
S.U.B. and Aquarius 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. S.U.B. (2018) is 2 years older than Aquarius (2020). Aquarius is free; S.U.B. is paid (1.99 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 Aquarius
Choose Aquarius if you want a Free To Play experience. On Steam, it's free to play, so the barrier to trying it is zero. Aquarius launched in 2020.
Both S.U.B. and Aquarius sit in Action and Indie on Steam and both list Multi-player, Shared/Split Screen, and Shared/Split Screen Co-op, 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
 S.U.B. |  Aquarius | |
|---|---|---|
| Released | 2018 | 2020 |
| Genres | Action, Indie, Adventure, Casual | Action, Indie, Free To Play |
| Platforms | Windows | Windows, macOS, Linux |
| Steam Deck | Unrated | Unrated |
| Price | 1.99 USD | Free to play |
| Steam reviews | 4 reviews | 92% positive (25 reviews) |
| Multiplayer | Multi-player, Shared/Split Screen Co-op, Co-op | Multi-player, Shared/Split Screen Co-op, Co-op |
| Developers | Spreadable Fruit Games, Brametjuhh, YinUkume, Zupami, Azurekai, Dwightojo, ChriticalHit | Iron Stag Games |
Side by side
- Both share Action, Indie on Steam.
- S.U.B. (2018) is 2 years older than Aquarius (2020).
- Aquarius is free; S.U.B. is paid (1.99 USD).
- Both support cooperative play.
S.U.B. vs Aquarius — FAQ
- Should I play S.U.B. or Aquarius first?
- If you want chronology, S.U.B. (2018) came out before Aquarius (2020). 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 S.U.B. and Aquarius 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.
- Do both S.U.B. and Aquarius have co-op?
- Yes — both list a co-op category on Steam. Specifics differ: S.U.B. ships Shared/Split Screen Co-op, Co-op; Aquarius ships Shared/Split Screen Co-op, Co-op.
- Is Aquarius free?
- Yes — Aquarius is a free-to-play Steam title. S.U.B. is paid (1.99 USD).