Mahjong 88 is a video slot game played on an 8x8 grid. Symbols are shown in the grid to form winning combinations. Matching symbols appearing in a cluster award a win according to the paytable. A symbol is part of a cluster when horizontally or vertically adjacent to the same symbol. Winning symbols are removed with replacement symbols filling empty spaces. The game continues until no new winning combinations can be created.
Concealed Tiles are blank symbols which will rotate to be revealed as a secret adjacent symbol.
All wins contribute to increasing the Fortune Frog meter. Fully charge the meter with 33 winning symbols. When no new winning combinations are created, 1 of the following effects is triggered:
• Croak - 1 symbol set is chosen, paying scattered.
• Spawn - 1 symbol set is chosen, transforming to another symbol.
• Tongue - 2 edges chosen, symbols between are transformed to another symbol.
• Hop - 1 symbol is chosen, transforming and destroying adjacent symbols.
The meter is not reset, and the game continues as normal after the effect.
Super Charge is triggered when over-charging the Fortune Frog meter with 88+ winning symbols. All wins achieved during the game round are multiplied by 5.
Fortune Frog and Super Charge can only be triggered once per game round.
Mahjong 88 has 4 seasons - spring, summer, autumn and winter.
Each season has its own unique wild symbol, triggered randomly on non-winning spins. Wild symbols substitute for all symbols and are removed if forming a win or if Fortune Frog is triggered.
• Spring - up to 12 wilds can appear, placed randomly on the grid.
• Summer - up to 5 wilds can appear, adjacent symbols are destroyed.
• Autumn - up to 11 wilds can appear, symbols turn wild or destroyed from edges.
• Winter - up to 4 wilds can appear, wilds not removed when winning.
The season can change at the end of a game round. The minimum number of spins in a season is 25. The maximum number of spins in a season is 99. The order of progression is fixed: spring to summer to autumn to winter.
All wins contribute to increasing the Season Bonus. The bonus is paid when the season changes.
The RTP is 94.63%.