Calipso

Thunderspin's Calipso is a video slot featuring 5 reels and 3 rows, with 21 fixed paylines set in a captivating underwater realm. This game immerses players in a world rich with mythological ocean themes, showcasing symbols such as seahorses, oysters containing pearls, starfish, mollusks, and the mermaid Calipso herself. A Wild symbol represented by a fish can substitute for regular symbols, aiding in the formation of winning combinations. There are two types of Scatter symbols: one is an ornate treasure chest that activates the Sunken Treasure Bonus Game when enough appear, while the other is the mermaid Calipso, a stacked reel scatter that unlocks the Free Spins feature. During the Free Spins round, players encounter a special scatter symbol, a fish that bears pearls, which grants additional free spins and helps accumulate “pearls” to increase multipliers. Collecting 5, 10, or 15 pearls during Free Spins raises the win multiplier to 4×, 6×, or 8×, respectively. The Sunken Treasure Bonus Game allows players to select from various underwater compartments to reveal cash prizes and multipliers, continuing until an empty compartment is chosen. Bets in Calipso cater to a range of preferences, from low to high, and there is no Bonus Buy feature available.

You can play it for real money.