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Great Blue — slot review
Great Blue is a slot by Playtech, high volatility. Theme: ocean, underwater world.
High volatility5x3
Free demo
Free, virtual chips only — no sign-up
Demo mode uses a virtual balance and pays no real winnings. It is meant for getting familiar with the game.
Specifications
| Provider | Playtech |
| Volatility | High volatility |
| Reels | 5x3 |
| Paylines | 25 paylines |
| Theme | ocean, underwater world |
| Mechanics | free spins, multipliers, wilds, gamble |
Great Blue review
An absolute Playtech classic and one of the most recognisable ocean slots in the CIS and Asia. The outwardly simple 5x3 game hides a fearsome bonus: before the free spins you open clams and can land up to 33 free spins with a multiplier as high as x15, and it's these rounds that deliver the legendary hits. A wild orca doubles wins in the base game too. Great Blue hooks players with its contrast: a calm underwater setting and the frantic variance of its bonus. A pick for old-school players who value simplicity, the double-up gamble and the potential of one big free-spin round.
Where to play Great Blue
Top-rated casinos from our ranking that carry Playtech games in their catalog:
First-deposit welcome bonus + free spins (e.g. 100 FS on Gates of Olympus); terms vary by country
100% on your first deposit up to €2000 + up to €5000 no-deposit in the Salva il Bottino game
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See also
This review was prepared by the Casino Atlas editorial team. Last updated: July 2026. Specs are based on provider data; the RTP version may differ at a specific casino.