Play Keys to the Sea for Free

Tentacles wrap around classic white columns, keeping a 6x5 symbol grid in place beneath the waves. Those symbols include five brightly-colored gems and four themed emblems, such as a shield and golden crown.

It’s a desktop and mobile game from Popiplay and you can grab the Keys to the Sea slot machine at our recommended sites that feature this range. Be sure to read the fair reviews of online casinos here.

Play the Keys to the Sea slot online and you win from eight or more matched symbols scattered in any places. You can spin the reels for between 0.20 and 25.00 to win these multiplies of your total bet –

A Bonus Buy triggers the free games on the next spin, while a Chance x2 feature doubles the stake, but improves the odds of entry to the bonus round. It’s a high volatility game, but the generous Poseidon offers average returns of 96.11%.

Winning symbols vanish and new ones drop down to fill the gaps. This ‘Refill’ mechanism repeats if the new mix of symbols includes at least eight of a kind, with no limit to how many can play out one after another.

Key symbols are key to the free games feature. Any four, five, or six award ten, 20, or 30 free spins in that order, with five further rounds if at least three keys land in a bonus game. This Keys to the Sea slot machine bonus feature is where the real treasures of the deep lie, as the trident symbol holds random multipliers from a range of 2x to 100x. This applies to any win from the free spin or series of Refills, and if several tridents appear, their values combine.

The same Greek god is the star of games such as the Ancient Fortunes Poseidon Megaways slot from Microgaming and the Hoard of Poseidon slot game by Red Tiger.

There’s nothing particularly cutting-edge about the Keys to the Sea online slot, but it doesn’t do anything wrong either. The graphics are mid-range in quality, with splashes of color from the gems and crown, and the gameplay, with scatter pays and cascades on every win can see decent payouts at any time.

It’s the free spins round where you find real depth, with valuable multipliers paid at the end of any Refills. If several float into view, Poseidon can grant huge wins. Play Keys to the Sea for free on this page, then dive in for real money at the best casinos online.