Moon Princess - 5×5 Cluster Slot With Three Princesses and Princess Trinity by Play'n GO

Moon Princess - Anime Cluster Pays on a 5×5 Grid

Released by Play'n GO in 2018, the Moon Princess slot machine replaces reels and paylines with a 5×5 grid and a cluster pays system, where 3 or more matching symbols connected horizontally or vertically anywhere on the board form a win.

The visual style draws directly from magical-girl anime, most notably Sailor Moon: three princesses - Love, Star, and Storm - stand beside the spinning grid throughout every round, each in a distinct color palette and each carrying her own Girl Power ability. The presentation stays bright and stylized rather than following the darker themes common in other high-volatility slots.

Unlike other slots with grid layouts, such as Reactoonz, Moon Princess adds two mechanics rarely found together elsewhere: a princess rotation system, where Girl Power triggers randomly and control passes between Love, Star, and Storm, and a Princess Trinity meter that can unleash all three abilities in a single spin. Both systems are explained in detail below.

Game Details

The table above confirms the Moon Princess RTP at 96.50% under the standard configuration, with a 94.51% alternative used by some operators. Unlike Gates of Olympus or Sweet Bonanza, Moon Princess has no scatter-based trigger - free spins depend on clearing the entire grid instead.

Three Princesses and Girl Power - How They Work

Girl Power can activate randomly even on non-winning spins. Only one princess is active at a time. Love Princess changes one group of symbols to another. Star Princess adds one or two Moon Wilds to the game board in random spots. Storm Princess destroys two symbol groups on the board to make way for new groups of symbols. None of these guarantee a winning hand. The active role passes to the next princess after use.

Princess Trinity - Charge and Trigger

Princess Trinity charges through winning clusters containing princess symbols: three symbols fill one meter section, four fill two, five fill three. A full meter triggers one special spin where Love, Star, and Storm all activate in sequence. Trinity is not the free spins feature - it's a separate event, though a grid clear during a Trinity spin can still lead into the bonus.

Free Spins - Princess Choice and Growing Multiplier

Clearing all 25 grid positions triggers free spins, and the player then chooses which princess leads the round. Love starts with 4 spins and transforms symbol groups, Star starts with 5 and adds Wilds, while Storm starts with 8 - the most of the three - and destroys symbol groups. Statistically, Storm's extra spins make it the most consistent choice at equivalent stakes, even though Love and Star can trigger their effects more aggressively per spin. The multiplier does not start from zero: it carries over any value already built up from a Princess Trinity charge, then grows by +1 with every cascade during the free spins, climbing as high as ×20 by the end of the round without ever resetting. A fresh Trinity charge during the round can retrigger its own bonus spin without ending the free spins early. For comparison, Book of Dead uses a conventional reel-and-payline structure, while Sugar Rush also combines cascading wins with multipliers but follows different feature logic.

Moon Princess vs Moon Princess 100 - What Changed

Moon Princess 100 is a separate 2022 release, not another name for the 2018 original. Both use a 5×5 grid, but Moon Princess 100 raises the maximum win to 15,000× against a slightly lower 96.20% RTP, and develops the multiplier system further.

Moon Princess Demo and Responsible Gambling

A Moon Princess demo lets players test cluster wins, Girl Power, Princess Trinity, and the free spins princess choice without wagering real money, availability permitting. With 10/10 volatility, sessions can vary widely, so a bankroll of at least 200× the bet size is recommended. VivatBet is a licensed casino intended for players aged 21 and over, and eligibility should be confirmed before playing.