The Moon Princess slot is Play'n GO's anime-style grid game: a 5 × 5 cascading grid with a 96.50% RTP, high volatility and a 5,000x max win. Three princesses, Love, Star and Storm, alter the grid with their powers, and clearing every symbol from the grid in one sequence is what starts the free spins.
Play'n GO slot on a 5 × 5 grid; three or more matching symbols in a horizontal or vertical line win, then cascade away.
Each cascade in a sequence adds 1x to a win multiplier.
Girl Power: Love changes one symbol type into another, Star adds wilds, Storm removes symbols.
Clear the whole grid to start free spins, where the multiplier keeps building between spins.
96.50% RTP and 5,000x max win: £10,000 at the £2 limit for 18–24s and £25,000 at £5.
Developer
Play'n GO
RTP
96.50%
Volatility
High
Layout
5 × 5 grid
Ways to win
Cascading grid
Max win
5,000x
Main feature
Girl Power princess modifiers and grid-clearing free spins
What the Moon Princess slot machine is
Moon Princess comes from Play'n GO, the independent Swedish studio based in Växjö that also makes Book of Dead and Reactoonz. Its artwork borrows from Japanese magical-girl cartoons, but the game is aimed at adults and works on the same principles as any other online slot: a random number generator fixes each result before the symbols fall.
It is a grid slot rather than a reel slot. There are no paylines; symbols simply fill a 5 × 5 square and wins are found in rows and columns. The same engine powers Play'n GO's Rise of Olympus.
How wins and cascades work on Moon Princess
A win needs three or more identical symbols next to each other in a straight horizontal or vertical line anywhere on the grid. The moon is the wild and stands in for other symbols. After every win, the winning symbols vanish, those above drop down and new ones fill the gaps: a cascade. Each cascade in the same sequence raises a win multiplier by 1x.
How the cascade multiplier builds in one sequence
Cascade in sequence
Multiplier on that win
Example win before multiplier
Paid
1st win
1x
20p
20p
2nd win
2x
30p
60p
3rd win
3x
20p
60p
No further win
Sequence ends
–
Total £1.40
The example uses invented amounts at a £1 stake to show the arithmetic only. In the base game the multiplier returns to 1x when a new spin begins.
Girl Power: Love, Star and Storm explained
On a spin that would otherwise not win, one of the princesses can step in at random with her power, which may or may not create a win. Each power changes the grid in a different way.
The three Moon Princess powers
Princess
Power
Effect on the grid
Love
Transform
Changes every symbol of one type into another type
Star
Wilds
Adds wild symbols to the grid
Storm
Destroy
Removes all symbols of two types, letting new ones fall in
These are random features decided by the RNG. A power that fails to make a win does not make the next one more likely to succeed. Love's power is a form of symbol transformation, and Star's is a type of random wilds.
The princess meter (Trinity)
Wins made of princess symbols fill a meter beside the grid. When it is full, all three princesses use their powers together on the same spin, which gives the best chance in the base game of clearing the grid.
Moon Princess free spins: clearing the grid
Free spins start when a cascade sequence removes every symbol from the grid. You then pick one princess, and your choice decides the number of starting spins and which power helps during the round. Published game guides list 4 spins with Love, 5 with Star and 8 with Storm, with extra spins possible during the round; check your version's help screen for the exact rules.
A cascade sequence clears all 25 positions.
Choose Love, Star or Storm.
Play the free spins; the chosen princess's power helps on spins as described in the rules.
The cascade multiplier does not reset between free spins, so it keeps climbing through the round.
When the spins run out, the total is added to your balance.
That carried-over multiplier is the source of the game's big results: a long bonus with many cascades can multiply late wins heavily. See increasing multipliers in free spins for how this design works elsewhere.
Your princess choice changes the shape of the round, not its long-run value. All three options are part of the same 96.50% RTP.
Moon Princess RTP and volatility
The published Moon Princess RTP is 96.50%, and volatility is high. Across millions of spins, about £96.50 of every £100 staked is returned, leaving £3.50 as the margin. Play'n GO supplies games to casinos at more than one RTP setting, so check the version you are playing; our guide to RTP variants explains why.
High volatility on this game means long runs of small cascades and empty Girl Power spins, with most of the value in rare grid clears. A clear can take a long time to arrive.
Moon Princess cost per 300 spins at 96.50% RTP
Stake per spin
Total staked (300 spins)
Average long-run cost
10p
£30
£1.05
20p
£60
£2.10
50p
£150
£5.25
£1
£300
£10.50
£2
£600
£21
300 spins at 50p is £150 staked; the average long-run cost is about £5.25, but a real session could lose all £150 or come out ahead. Use the slot cost calculator to model your own stake.
Moon Princess max win at UK stake limits
The Moon Princess max win is 5,000x your stake. The table converts that into pounds, including the stake caps for online slots in Great Britain.
Moon Princess max win by stake
Stake
Context
Max win (5,000x)
10p
Lowest common stake
£500
£1
Mid stake
£5,000
£2
Limit for players aged 18–24
£10,000
£5
Limit for players aged 25+
£25,000
No developer odds are published for reaching the ceiling, so we don't give any. Check the casino's terms for its own payout limits.
Is the Moon Princess slot worth playing?
It suits adults who like grid games with lots of movement and can live with long gaps between bonuses. It is a weak fit for small budgets, since grid clears are rare and high volatility can empty a balance quickly.
Advantages
96.50% published RTP.
Girl Power gives losing spins a second chance to win.
The UK version has no autoplay, turbo or quick-spin, and every game cycle, including all its cascades, must take at least 2.5 seconds, under the Commission's online games design rules (opens in a new tab) in force since 31 October 2021. Wins smaller than your stake aren't celebrated. The stake limit guidance (opens in a new tab) caps stakes at £5 for players aged 25 and over and £2 for 18 to 24-year-olds. Our page on the net position display rule explains the running total you see on screen.
Moon Princess demo and safer play
A Moon Princess demo is available at many UK casinos after age and ID verification (opens in a new tab), required since May 2019. Despite the cartoon art, the game and its demo are for adults only. If gambling is affecting you, GamCare's live chat (opens in a new tab) and the National Gambling Helpline on 0808 8020 133 are free and confidential.
Where to play Moon Princess in the UK
Play'n GO games are carried by many UK casinos, but lobbies change, so search for Moon Princess at the casino before depositing.
Moon Princess isn't named in any of our partner offers. Coral gives new players 100 free spins at 10p each on selected games after a £10 slots bet, valid 7 days; Ladbrokes gives up to 500 free spins at 10p over 10 days after £10 of slots play; and PlayOJO's 80 no-wagering spins are on Big Bass Bonanza. All are 18+ and terms apply; see best slot offers UK for a comparison.
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 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.
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.
18+. Gambling should be entertainment that costs money, not a way to make it. Decide a budget before you play: plan a slot budget. Free, confidential help: National Gambling Helpline 0808 8020 133.
Frequently asked questions
What is the Moon Princess RTP?
The published Moon Princess RTP is 96.50%. Over millions of spins, the game returns about £96.50 for every £100 staked and keeps £3.50. It is a long-run average, so a session of a few hundred spins can land far from it. Play'n GO supplies some games at lower settings, so open the game rules at your casino to confirm the version. Our RTP explainer explains what the percentage does and doesn't tell you.
How do you trigger free spins on Moon Princess?
Free spins start when a single cascade sequence removes every symbol from the 5 × 5 grid. You then choose Love, Star or Storm, which sets your starting spins and the power that helps during the round. The princess meter, which fills with princess wins, can help by firing all three powers together. There is no bonus buy in the UK version. For the general principles, read what triggers a bonus round.
Which princess should I choose in Moon Princess free spins?
No choice is better in long-run value; all three are built into the same 96.50% RTP. Published game guides list Storm with the most starting spins, Star with five and Love with four, but each princess's power affects the round differently. The choice changes how outcomes are spread, not what you should expect on average. Pick the one you enjoy. Our page on volatility explains why spread matters.
What is the Moon Princess max win?
The Moon Princess max win is 5,000x your stake. That is £500 at 10p, £5,000 at £1, £10,000 at the £2 limit for players aged 18 to 24, and £25,000 at the £5 limit for those aged 25 and over. Reaching it is very rare, and the developer does not publish the odds. Moon Princess 100 has a higher 15,000x ceiling. The max win glossary entry explains how these caps work.
What does Girl Power do in Moon Princess?
Girl Power is a random feature that can trigger on a spin that would not otherwise win. Love turns all symbols of one type into another, Star adds wilds to the grid, and Storm removes all symbols of two types so new ones fall in. A full princess meter fires all three at once. The powers don't always create a win, and a failed one has no effect on later spins. Our guide to random wilds covers one of these ideas.
How does the Moon Princess multiplier work?
Each cascade in a sequence adds 1x to a win multiplier: the first win is paid at 1x, the second at 2x, the third at 3x and so on. In the base game the multiplier resets at the start of each spin. In free spins it carries over from spin to spin, so it can keep growing through the round, which is where the biggest wins come from. Our page on progressive multipliers explains the general design.
Is Moon Princess high volatility?
Yes, Moon Princess is rated high volatility. Most spins produce small cascades or nothing, and the free spins, which need a full grid clear, can take a long time to appear. When they do, the carried-over multiplier gives a wide range of outcomes. A small budget may run out before a bonus. If you want a gentler ride, our list of low volatility slot machines suggests alternatives.
What is the difference between Moon Princess and Moon Princess 100?
Moon Princess 100 is a 2022 remake by Play'n GO. It lists a top RTP of 96.2%, a 15,000x max win and a free spins multiplier that can reach 100x, while the original lists 96.50% RTP and a 5,000x max win. Both use a 5 × 5 grid with the three princesses. The remake has a higher ceiling but a slightly lower top RTP. See our Moon Princess 100 page for the details.
Can I play Moon Princess for free in the UK?
You can play the demo at many UK casinos, but only after age verification, which the Gambling Commission has required since May 2019 for free-to-play gambling games. The demo uses the same maths as the real game, so it shows how cascades, Girl Power and grid clears work, though demo credit has no value. The game is for adults only despite its cartoon style. Read our demo slots guide for more.
Who makes Moon Princess?
Moon Princess is made by Play'n GO, an independent, privately held studio headquartered in Växjö, Sweden, whose first gaming product was built in 1997. It is known for Book of Dead, Reactoonz and Legacy of Dead, and for its recurring adventurer Rich Wilde. Its library runs to several hundred games, and Moon Princess is one of its best-known grid titles. Our Play'n GO provider page has more about the studio.
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