Great Blue free spins can mean casino spins you use on Playtech's 2013 ocean slot or the game's own shell-pick bonus round. Casino spins at 10p are worth about 9.6p each on average at the 96.03% RTP, so 100 of them (£10 of play) return roughly £9.60 over the long run, with high volatility making short runs very uneven.
Great Blue has a 96.03% RTP, high volatility and 25 paylines on a 5 × 3 layout.
100 casino spins at 10p average about £9.60 back; with 10x wagering the expected value is about £5.79.
Published game guides describe 8 free spins at 2x from three or more scatters, with two shell picks that can add spins or raise the multiplier.
Our partners don't name Great Blue for their spins; check each offer's selected games.
18+, terms apply; UK bonus wagering is capped at 10x since 19 January 2026.
Developer
Playtech
RTP
96.03%
Volatility
High
Layout
5 × 3
Ways to win
25 paylines
Released
2013
Great Blue free spins: offer spins and bonus spins
Playtech's Great Blue has been around since 2013, and its bonus round, built on picking shells to set the size of a free spins feature, is the feature the game is built around. That is one meaning of Great Blue free spins. The other is a casino promotion: spins at a fixed stake, usually 10p, that you can use if the offer lists Great Blue among its games.
The two work differently. Offer spins come with terms such as wagering, expiry and payment rules. Bonus spins are part of the game and follow the rules in its help screen. We cover the value of offer spins first, then the bonus round, then the UK rules. The free spins hub is the place to compare offer types.
What 10p Great Blue free spins are worth
Great Blue's RTP is 96.03%, so the house edge is 3.97%. The average return from a batch of casino spins is the face value multiplied by the RTP.
Great Blue free spins value at 96.03% RTP
Spins
Face value at 10p
Average return
Average cost
20
£2
£1.92
8p
50
£5
£4.80
20p
80
£8
£7.68
32p
100
£10
£9.60
40p
500
£50
£48.02
£1.98
Those averages hold over a very large number of spins. On a high-volatility game like Great Blue, most batches of 50 or 100 spins return less than the average, and the shortfall is balanced by occasional large results, often from the bonus round. The free spins value guide explains the method.
High volatility and a short allowance of spins
Great Blue is rated high volatility, and its design helps explain why. Much of the game's return is concentrated in the free spins round, where multipliers scale every win. If the round doesn't land during a batch of casino spins, the batch usually returns well under face value; if it does, the batch can return many times more.
That makes Great Blue a less predictable choice for a small offer than a lower-volatility game. Our page on free spins on high volatility slots explains how to think about it, and the volatility entry defines the term.
No bonus changes Great Blue's odds. The 3.97% house edge applies to every spin, whether it is paid for with your money, bonus funds or a promotional spin.
How to trigger free spins on Great Blue
Published game guides describe the Great Blue bonus like this: three or more scatter symbols anywhere on the reels start a round of 8 free spins with a 2x multiplier. Before the spins begin, you pick two shells out of five, and each can reveal extra free spins or a higher multiplier, taking the round to as many as 33 spins or as high as 15x. The round can be retriggered. Details can vary between versions, so confirm them in the help screen at your casino.
Land three or more scatter symbols on one spin.
Start with 8 free spins at a 2x multiplier.
Pick two shells from five; each reveals extra spins or a bigger multiplier.
Play the free spins with the total spins and multiplier you've revealed.
Watch for further scatters, which can retrigger the round.
As with any pick feature, the shells are decided by the game's random number generator, so no choice is better than another. Treat any figure for how often the bonus lands with caution, as the developer doesn't publish one. Our page on whether free spins can trigger the bonus round explains how a promotional spin that lands the bonus is paid.
Great Blue bonus multipliers in pounds
The multiplier is what makes the round valuable, and it is easy to see in money. Take a line win that would pay 50p on a 10p spin in the base game. Here is what the same win pays at different multipliers in the free spins round.
A 50p line win at Great Blue bonus multipliers
Multiplier
Payout
Illustration
1x (base game)
50p
No bonus multiplier
2x (starting value)
£1
Round starts here
5x
£2.50
After a multiplier pick
10x
£5
After a bigger multiplier pick
15x (top value)
£7.50
Highest multiplier described
The wild, a whale, substitutes for other symbols except the scatter and is described as doubling any win it is part of. Playtech's own help screen gives the maximum win for the version on offer; check it there, since a spin offer may also cap winnings below it. The free spins max win page covers those caps.
Great Blue free spins no wagering vs 10x wagering
Take the average £9.60 from 100 spins. Under no-wagering terms it is cash. Under 10x wagering, you would need to stake £96 first; at 3.97% that costs about £3.81 on average, leaving around £5.79. On a high-volatility game there is also a real chance the bonus balance runs out before you finish.
Advantages
No wagering: the full £9.60 average is withdrawable
No wagering: no max-bet rule while clearing
UK cap: wagering can't exceed 10x since 19 January 2026
None of our partners offers Great Blue free spins no deposit, and none has any no-deposit bonus. Offers like that are rare at UK-licensed casinos and usually small, capped and tied to a single game. Age and identity checks have been required before any play since May 2019. Our free spins no deposit page explains what to check in the terms.
Great Blue compared with other sea-themed slots
Great Blue sits alongside other underwater and fishing games that UK players often compare. Here is how 100 spins at 10p average out on a few of them.
At UK-licensed casinos, Great Blue follows the Gambling Commission's slot design rules (opens in a new tab) in force since 31 October 2021, so there is no autoplay, turbo or slam-stop, and each spin lasts at least 2.5 seconds. Stakes are capped at £5 per spin for players aged 25 and over (since 9 April 2025) and £2 for those aged 18 to 24 (since 21 May 2025). Feature buys aren't offered, so the shell-pick bonus can only be reached by landing scatters. Since 19 January 2026 bonus wagering is capped at 10x. Our online slot stake limits page explains the caps.
Where to use free spins similar to Great Blue free spins
None of our partners names Great Blue as its spin game. For a sea theme, PlayOJO is the closest fit: 18+, new UK customers outside Northern Ireland, 80 free spins on Big Bass Bonanza with a first deposit of at least £10, 10p a spin (£8 of play), no wagering on winnings. At Big Bass Bonanza's 96.71% RTP, those spins average about £7.74 back. Terms apply; see PlayOJO free spins.
Coral gives 100 free spins after you deposit and bet £10 on slots, at 10p each with 48 hours to accept, 7 days to use and no wagering. Ladbrokes gives 50 free spins a day for 10 days, up to 500, after £10 of slots play, at 10p and wager-free. Both list their own selected games, so check the promotion page, and both exclude PayPal, Skrill, Neteller, Paysafe and prepaid cards. Compare the three on 80 vs 100 free spins.
Coral and Ladbrokes are both run by LC International Limited (Entain). If you already hold an account with one Entain brand, you may not be able to open a new account with another; check the terms before signing up.
Significant terms: 18+. New UK customers (excluding Northern Ireland). First deposit only. Minimum deposit £10. 80 free spins on Big Bass Bonanza, £0.10 each. No wagering requirements; winnings paid in cash. Cannot be used with any other offer. Only available to players who arrive through the designated offer link. Full T&Cs apply. GamCare.org.uk
Read the PlayOJO reviewLicence: Skill On Net Limited, UKGC account 39326. Offer checked 5 October 2026.
Significant terms: 18+. New players only. Offer runs 01/10/2026 to 01/02/2027. Deposit (certain types excluded) and bet £10+ on slot games to get 100 free spins (selected games, £0.10 each, 48 hrs to accept, valid 7 days). No wagering on free spin winnings. Deposits by Neteller, PayPal, Paysafe, Skrill, prepaid cards and certain debit cards do not qualify. Restrictions and T&Cs apply. GamCare.org.uk
Read the Coral reviewLicence: LC International Limited, UKGC account 54743. Offer checked 5 October 2026.
Significant terms: 18+. New customers only, from 14/11/25 until further notice. Certain deposit methods excluded. Deposit and spend £10+ on slots for 50 free spins a day during the first 10 days after first deposit and registration (max 500, £0.10 each, selected games, claim before 23:59 each day, valid 7 days). No wagering. Prepaid cards, PayPal, Paysafe, Neteller, Skrill and Moneybookers deposits do not qualify. Restrictions and T&Cs apply. GamCare.org.uk
Read the Ladbrokes reviewLicence: LC International Limited, UKGC account 54743. Offer checked 5 October 2026.
18+. Gambling should be entertainment that costs money, not a way to make it. Decide a budget before you play: set a budget. Free, confidential help: National Gambling Helpline 0808 8020 133.
Frequently asked questions
What is the Great Blue RTP?
Great Blue's RTP is 96.03%, meaning about £96.03 is returned per £100 staked over a very long run, with a house edge of 3.97%. The figure covers the whole game, including the free spins round and its multipliers. Using casino spins doesn't change it. Check the information screen at your casino for the version on offer. Our RTP glossary entry explains what the number does and doesn't tell you.
How do you trigger free spins on Great Blue?
Three or more scatter symbols anywhere on the reels start the bonus, according to published game guides. You begin with 8 free spins at 2x, then pick two of five shells, each revealing extra spins or a higher multiplier, up to 33 spins or 15x. The round can be retriggered. Confirm the details in the help screen, since versions can differ. See how free spins work.
What are 100 free spins on Great Blue worth?
At 10p each, 100 spins are £10 of play, and at the 96.03% RTP their average return is about £9.60. High volatility means most 100-spin runs return less than that, while a few return much more, usually when the shell bonus lands. With 10x wagering, expected value falls to roughly £5.79. Our is 100 free spins good page compares real offers.
Which shells should I pick in Great Blue?
It doesn't matter. The shells' contents are decided by the game's random number generator, so no shell or position is more likely to hold extra spins or a bigger multiplier. Any advice claiming a picking pattern improves your return isn't reliable. The pick is a presentation feature, and the overall RTP already includes everything it can pay. Our explainer on can you lose money with free spins covers similar myths.
Can I get Great Blue free spins with no deposit?
Not from our partners, none of which offers a no-deposit bonus. At other UK-licensed casinos, no-deposit spins are uncommon and usually small, game-specific and capped. You must pass age and identity checks before playing. If you find such an offer, check whether Great Blue is on its games list and what the cap is. The no deposit bonus codes page explains why codes rarely help.
Do Great Blue free spins have wagering?
That depends on the casino offer. No-wagering spins pay cash straight away; wagering spins pay bonus money that must be staked up to 10x before it can be withdrawn, the UK limit since 19 January 2026. Our partners' spin offers are all wager-free, though none names Great Blue as its game. The no wagering bonus guide explains how cash-paid spins work.
What does the whale wild do in Great Blue?
The whale wild substitutes for other symbols except the scatter and is described in game guides as doubling any win it helps form. In the free spins round, wins are also scaled by the multiplier you revealed in the shell picks. The game's paytable sets out exactly how wilds and multipliers combine in your version, so check it before playing. Our Playtech free spins page covers the studio's other games.
Can I buy the Great Blue bonus in the UK?
No. Feature buys aren't offered on slots at UK-licensed casinos, so the shell-pick bonus can only be reached by landing three or more scatters. The UK version also has no autoplay or turbo, and each spin lasts at least 2.5 seconds under rules in force since 31 October 2021. Stake caps of £5 (25+) and £2 (18–24) apply. See slot game design rules for the full list.
Is Great Blue good for a free spins offer?
It suits people comfortable with uneven results. The 96.03% RTP keeps the average value of 10p spins close to face value, but high volatility means much depends on whether the bonus lands within your allowance. If you'd rather have a steadier run, a medium-volatility game is calmer. Our comparison of free spins on low vs high volatility slots sets out the trade-off.
Gambling can be addictive. Free, confidential help is available 24 hours a day from the National Gambling Helpline on 0808 8020 133. Visit GamCare.org.uk and GamCare, or block yourself from all UK-licensed gambling sites with GAMSTOP.
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