Moon Princess vs Moon Princess 100

Moon Princess vs Moon Princess 100 at a glance

Moon Princess is one of Play'n GO's best-known grid games: a 5×5 board, three princess characters and wins that cascade. Moon Princess 100 keeps that board and the high-volatility profile, but it reworks the maths around a far bigger top prize. If you are weighing up other sequels, our slot comparison hub has them side by side.

How wins form on the Moon Princess grid

Neither game uses paylines. A win needs three or more identical symbols next to each other in a straight horizontal row or vertical column. Winning symbols then disappear and the symbols above drop down, with new ones filling the gaps from the top. This cascading reels process (also called a tumble) repeats until no new win forms, so one paid spin can contain several wins.

Here's a simple worked example on a 5×5 board. Suppose three hearts line up in the middle row, columns 2 to 4. They pay and vanish; the symbols above fall one space; and a new set of three blue gems happens to line up vertically in column 3. That second win is paid within the same spin. The values depend on the paytable; the point is that a single stake can produce a chain of wins, which is why grid slot machines feel so different from line games.

The princesses and their grid-changing powers

Both games feature three princesses whose powers change the board: transforming symbols, adding wilds or clearing symbols so that new cascades can form. Effects like these are covered in general on our pages on symbol transformation and random wilds. When the powers trigger and exactly what each does is set out in each game's help screen, and Moon Princess 100 retunes them as part of its new maths model.

Both games also have a free spins round where multipliers carry more weight than in the base game. Because the sequel's ceiling is three times higher, more of its return is likely to be concentrated in that round. Play'n GO doesn't publish trigger rates that we hold, so we don't estimate how often either round appears.

From 5,000x to 15,000x: what the bigger ceiling costs

Moon Princess 100 is a neat illustration of a trade-off seen across modern slot design. The sequel offers a ceiling three times higher, yet its top RTP is 0.3 points lower. Two things happen at once: the house keeps a little more on average, and the return that remains is spread over a wider range of outcomes, with more of it sitting in rare, large results.

In pounds: £100 staked at £1 a spin costs £3.50 on average on the original and £3.80 on the sequel. That 30p is the price, in long-run terms, of the larger top prize. Whether it's worth paying depends entirely on how you like a game to behave. How a ceiling is built into the maths is covered under max win caps.

Moon Princess 100 RTP: why 'top version' matters

Our data lists 96.2% as Moon Princess 100's top version, which means the game is also supplied at lower settings. Casinos choose which one to run, and a lower version could cost noticeably more over time. The same can apply to the original. RTP variants explains why studios do this. The Gambling Commission's standard on game rules and the likelihood of winning (opens in a new tab) is why the figure should be available in the game itself.

1. Open Moon Princess 100 without placing a stake.
2. Tap the menu, then the paytable or game rules.
3. Scroll to the line headed 'return to player' or 'RTP'.
4. Compare it with 96.2%; if it's lower, the game costs more on average.
5. Do the same for Moon Princess and compare with 96.50%.

The guide to finding a slot's RTP covers the menus of most studios.

Cost per 100 spins on each version

The table shows how much 100 spins stake in total and the average theoretical cost at each game's listed RTP.

Remember that these are averages over enormous numbers of spins. On high-volatility games, a real 100-spin session can lose far more than the table shows, or occasionally return more than was staked.

Max win at UK stake limits

Since 2025, online slot stakes in Great Britain have been capped at £5 a spin for players aged 25 and over and £2 for 18 to 24-year-olds (see the Gambling Commission's online slots stake limit guidance (opens in a new tab)). The ceilings convert like this.

At £5, the sequel's top prize is £75,000 against £25,000 for the original. Both are extremely rare outcomes and shouldn't shape your expectations for a session.

High volatility and your budget

Both games are high-volatility slot machines, so dry spells are part of the design. A £50 budget at 50p a spin covers 100 spins if nothing comes back. With cascades, small wins do arrive, but most of the value sits in the princess features and free spins, and it's common for a budget to be gone before the bigger moments appear. The sequel, with its taller ceiling, leans further that way.

UK rules for both Moon Princess slots

UK versions follow the online slot design rules in force since 31 October 2021: no autoplay, no turbo or slam-stop, at least 2.5 seconds per spin, net position on screen and no celebration of returns equal to or less than the stake. The Commission's summary of the rule changes (opens in a new tab) has the exact wording, and our page on the spin speed rule explains how the 2.5 seconds is measured. Feature buys aren't offered on UK versions, and demo play is free only after age verification.

Moon Princess myths

• 'Long cascade chains mean the game is warming up.' Each spin's result is decided by the RNG when you press spin; the cascade only plays it out.
• 'A princess power is due after a quiet spell.' Features aren't due; every spin is independent.
• 'A 15,000x ceiling means bigger wins in general.' It means a bigger possible top prize; typical sessions may feel leaner.
• 'Spinning faster or slower changes the result.' See does the speed of spinning matter?.

Moon Princess or Moon Princess 100: which to play?

Lowest cost: Moon Princess. Highest possible prize: Moon Princess 100. New to cascading grids: try the original in demo mode first, after age verification. Players who like this format might compare Play'n GO's other grid series in Reactoonz vs Reactoonz 2, while our guide to slot sequels looks at what tends to change from one instalment to the next.

Where to play Moon Princess online in the UK

We can't promise either game is in a particular lobby, so search the casino's lobby; game availability changes. Three welcome offers appear on this page: Coral's bet £10 on slots, get 100 free spins (10p each, selected games, valid 7 days, no wagering on winnings), Ladbrokes' 50 free spins a day for the first 10 days after you play £10 on slots (up to 500, 10p each, claim by 23:59 daily) and PlayOJO's 80 free spins on Big Bass Bonanza with a first deposit of £10 or more, winnings paid as cash. They're for new customers aged 18+; some payment methods don't qualify and terms apply. Offer spins are on selected games only. See Ladbrokes and our guide to daily free spins.

Keep play within a budget you can afford to lose. GAMSTOP (opens in a new tab) lets you block all UK-licensed gambling sites at once if you need a break.

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.