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.
Aquarius vs Watch Out: Shark!
Aquarius and Watch Out: Shark! 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. Aquarius (2020) is 6 years older than Watch Out: Shark! (2026). Aquarius is free; Watch Out: Shark! is paid (Price unknown). 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 Watch Out: Shark!
Choose Watch Out: Shark! if you want a Casual game with Steam Leaderboards, Shared/Split Screen PvP, and PvP. On Steam, it's the newer release (2026) and ships with the modern feature baseline. Watch Out: Shark! launched in 2026.
Both Aquarius and Watch Out: Shark! 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
 Aquarius |  Watch Out: Shark! | |
|---|---|---|
| Released | 2020 | 2026 |
| Genres | Action, Indie, Free To Play | Action, Indie, Casual |
| Platforms | Windows, macOS, Linux | Windows |
| Steam Deck | Unrated | Unrated |
| Price | Free to play | Price unknown |
| Steam 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 | Iron Stag Games | Blue Monkey |
Side by side
- Both share Action, Indie on Steam.
- Aquarius (2020) is 6 years older than Watch Out: Shark! (2026).
- Aquarius is free; Watch Out: Shark! is paid (Price unknown).
- Both support cooperative play.
Aquarius vs Watch Out: Shark! — FAQ
- Should I play Aquarius or Watch Out: Shark! first?
- If you want chronology, Aquarius (2020) came out before Watch Out: Shark! (2026). 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 Aquarius and Watch Out: Shark! 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 Aquarius and Watch Out: Shark! have co-op?
- Yes — both list a co-op category on Steam. Specifics differ: Aquarius ships Shared/Split Screen Co-op, Co-op; Watch Out: Shark! ships Shared/Split Screen Co-op, Co-op.
- Is Aquarius free?
- Yes — Aquarius is a free-to-play Steam title. Watch Out: Shark! is paid (Price unknown).