Choose 30XX
Choose 30XX if you want the Steam Leaderboards and Online Co-op side of the pairing. 1,750 Steam reviews back the pick.
30XX vs Fireboy & Watergirl 4: The Crystal Temple
30XX and Fireboy & Watergirl 4: The Crystal Temple 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. 30XX (2023) is 3 years older than Fireboy & Watergirl 4: The Crystal Temple (2026). Fireboy & Watergirl 4: The Crystal Temple scores higher on Steam reviews (94.4% positive) than 30XX (91.5% 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 Fireboy & Watergirl 4: The Crystal Temple
Choose Fireboy & Watergirl 4: The Crystal Temple if you want an Adventure game with Custom Volume Controls. On Steam, it's currently about 96% cheaper on the Steam Store. Fireboy & Watergirl 4: The Crystal Temple launched in 2026.
Both 30XX and Fireboy & Watergirl 4: The Crystal Temple 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
 30XX |  Fireboy & Watergirl 4: The Crystal Temple | |
|---|---|---|
| Released | 2023 | 2026 |
| Genres | Action, Indie | Action, Indie, Adventure |
| Platforms | Windows | Windows |
| Steam Deck | Deck Playable | Unrated |
| Price | 19.99 USD | 0.89 USD |
| Steam reviews | 91.5% positive (1,750 reviews) | 94.4% positive (18 reviews) |
| Multiplayer | Multi-player, Online Co-op, Shared/Split Screen Co-op | Multi-player, Shared/Split Screen Co-op, Co-op |
| Developers | Batterystaple Games | Oslo Albet |
Side by side
- Both share Action, Indie on Steam.
- 30XX (2023) is 3 years older than Fireboy & Watergirl 4: The Crystal Temple (2026).
- Fireboy & Watergirl 4: The Crystal Temple scores higher on Steam reviews (94.4% positive) than 30XX (91.5% positive).
- Fireboy & Watergirl 4: The Crystal Temple is currently ~96% cheaper on Steam than 30XX (0.89 USD vs. 19.99 USD).
- Both support cooperative play.
- 30XX is Deck Playable on Steam Deck; Fireboy & Watergirl 4: The Crystal Temple has no Deck rating yet.
30XX vs Fireboy & Watergirl 4: The Crystal Temple — FAQ
- Should I play 30XX or Fireboy & Watergirl 4: The Crystal Temple first?
- If you want chronology, 30XX (2023) came out before Fireboy & Watergirl 4: The Crystal Temple (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 30XX and Fireboy & Watergirl 4: The Crystal Temple 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 30XX and Fireboy & Watergirl 4: The Crystal Temple have co-op?
- Yes — both list a co-op category on Steam. Specifics differ: 30XX ships Online Co-op, Shared/Split Screen Co-op; Fireboy & Watergirl 4: The Crystal Temple ships Shared/Split Screen Co-op, Co-op.
- Does 30XX run on Steam Deck?
- Yes — 30XX is rated Deck Playable by Valve. Fireboy & Watergirl 4: The Crystal Temple doesn't have a Deck rating yet, so its Deck behaviour is currently unverified.