We believe in going the extra mile in our quest to bring you essential facts about playing free online games. And this week we’ve been turning our attention towards Mystery Symbol slots.

Find out what Mystery Symbols are, how they work and which are the best free-to-play slots offering the chance to try out the mechanic. We’ve got some top recommendations about where to play too, presenting you with the complete picture.

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Mystery Symbol slots

Whether you’re searching for the best progressive jackpots at a sweepstakes casino, or you want to know how to claim all your free Coins, you can count on us here at BILPlay to have the answers. And in this article, we’re exploring Mystery Symbols in online slot games.

Mystery Symbols spin up onto the reels before opening to reveal the same paytable symbol, or bonus icons. That means they have the potential to spin up additional winning combos, or even to generate special bonus features or modifiers.

Players enjoy Mystery Symbols, as they add an extra element of surprise to gameplay. Waiting for the icons to reveal themselves is exciting, especially when there could be big multipliers or bonus rounds on offer.

Try these Mystery Symbol slots

Mystery Symbol slots come in just about every theme you could imagine, so there’s a game to suit every type of player. And whether it’s the popular ‘Book of’ slots, that award a Special Expanding Symbol with every free spin bonus, or Mysterious Egypt, which uses a similar mechanic for extra winning potential, there’s always excitement to be found in games offering this feature.

Three of our particular favorites are:

• Spellbinding Mystery:? Created by Pragmatic Play, this is a 7x 7 Cluster Pays slot, with Mystery Star icons that reveal matched symbols, and up to 5x Multiplier Wilds. Free spins come with Sticky Mystery Symbols and an upgraded multiplier.
• Mystery of the Orient:? 5x3 Mystery Symbols in this Pragmatic Play slot come in the form of ornate doors, which open to reveal? Wild multipliers, Scatters or free spin bonus symbols. There’s the potential to unlock extra rows and expand the game grid too.
• Om Nom: Created by Hacksaw Gaming, this quirky game plays out on a 4x4 grid. A mystery symbol spins up to the left of the reels, and if it matches a winning symbol, a multiplier is awarded. Designed to be played on mobiles, this is a unique take on a fun mechanic.

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4.8/5

Social Casino Bonus

4.8/5

$55 Stake Cash + 260K Gold Coins + 5% Rakeback

Welcome Bonus

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T&Cs apply, 18+

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Play free Mystery Symbol slots

You can play free Pragmatic Play slot games at WOW Vegas and Stake.us, both of which offer hundreds of top-quality games from leading developers. We often have some exclusive promo codes too, to help you get off to a great start with some extra free Coins.

Take a look at our Stake.us review, and you’ll find you can also access Hacksaw Gaming slots, including Om Nom. New games are always being added, so there’s always something fresh and exciting to discover – including some great bonuses!