“Mermaid’s Pearl” is a 5-, 10- or 20-line, 5-reel slot featuring an underwater theme with mermaids and sunken treasures. Three, four or five scattered TREASURE CHESTS trigger 40, 50 or 60 Bonus Games. The MERMAID symbol substitutes all symbols except the TREASURE CHEST symbol and doubles when substituting. All wins pay from left to right except the scattered TREASURE CHEST symbol.