The objective is to form successful combinations of at least three symbols on a grid of five reels and five rows. Wins can commence in any orientation, horizontal or vertical, and the same icon can be used in multiple combinations. Using a highly volatile mathematical model, the game generates a maximum player return of 96.2%. Bet levels differ from 0.10 to 100.
The three princesses also appear on the three premium pay symbols, which are worth 3x the wager for a pure five-of-a-kind and 2x the wager for a blended five-of-a-kind of princess symbols. The next four symbols on the paytable are of lesser value, with a payout of 1x the wager for a successful line of five symbols. As we'll see next, wins activate a multitude of features.
When winning combinations are formed, the symbols that comprise them are eliminated and the remaining symbols on the grid drop down to fill the voids; new symbols do not materialise from above as they would in a typical cascade-style game. However, successful combinations leave behind a wild symbol. Wilds substitute for all pay symbols, and victorious wild lines pay up to five times the wager for a full house.
Additionally, faint blue lines will surround arbitrary positions on the board. Winning on a highlighted zone adds one to the win multiplier. The multiplier for wins is reset between paid spins.
Moon Princess Trinity's three attendants are not merely for display. Each possesses a power that modifies the reel. On non-winning rotations, the visible lady may activate one of the following abilities:
On the side of the reels is a three-segment gilded metre. Obtaining 3, 4, or 5 identical princess symbols respectively fills 1, 2, or 3 segments. Completely filling the metre initiates a Trinity game round. Trinity is one free game round in which each of Love, Star, and Storm execute their respective modifier. During Trinity, if the grid is cleared, the feature is retriggered and the win multiplier is not reset.