Mystery symbols are one of the most exciting features in modern online slot games, offering players the chance to unlock surprise payouts and enhance the thrill of the game. These symbols add an element of unpredictability, as they can transform into various other symbols, often leading to big wins. In 2025, many online slots incorporate mystery symbols as a key feature, making them even more engaging and rewarding. Here are some of the best online slot games with mystery symbols that you should try.
1. Mystery Museum (Push Gaming)
Mystery Museum by Push Gaming is an excellent example of a slot game that features mystery symbols. The game revolves around an archaeological theme, where players explore an ancient museum filled with mysterious artifacts. The key feature of this game is the Mystery Symbol that can transform into any other symbol, including high-value symbols or wilds. This gives players a chance to create big wins when the mystery symbol transforms into matching symbols on the reels. Additionally, the game has a Free Spins bonus round, where mystery symbols can appear more frequently, increasing the potential for significant payouts.
2. Vault of Anubis (Play’n GO)
Vault of Anubis from Play’n GO is a slot game set in ancient Egypt, and it introduces an exciting Mystery Symbol feature. When the mystery symbol lands on the reels, it can transform into a random symbol, making it easier to complete winning combinations. This symbol can also trigger the Vault Bonus, where players can unlock even more mystery symbols and free spins. The rich Egyptian theme, coupled with the unpredictable nature of mystery symbols, creates an engaging experience that can lead to substantial rewards.
3. Jammin’ Jars 2 (Push Gaming)
Jammin’ Jars 2 is a funky, fruit-themed slot from Push Gaming OLE777 that brings a colorful twist to the mystery symbol feature. In this game, the Mystery Symbol can appear on any spin and will reveal a random fruit symbol. What makes this feature even more exciting is that the mystery symbols are stacked, meaning multiple mystery symbols can appear on the same spin, potentially creating a chain of big wins. The Jar Feature can also boost the mystery symbol payouts, making this an energetic and rewarding slot to play.
4. The Dog House Megaways (Pragmatic Play)
In The Dog House Megaways, an extension of the popular The Dog House slot, mystery symbols add to the excitement. The game features the Mystery Symbol that can appear in any spin and reveal any other symbol, helping players complete winning combinations. With the addition of the Megaways mechanic, there are thousands of ways to win, and the mystery symbols make it even easier to land a rewarding payout. The game’s bonus round, with free spins and sticky wilds, further increases the excitement and winning potential.
5. Gonzo’s Quest Megaways (NetEnt)
Gonzo’s Quest Megaways brings back the classic adventure of the famous conquistador, Gonzo, with a fresh new twist, including the addition of mystery symbols. The Mystery Symbol in this game transforms into a random symbol to help form new winning combinations. With the added Megaways mechanic, players have more ways to win, and the mystery symbols appear more often in the free spins round, making it easier to hit big payouts. The expanding multipliers in the free spins feature also increase the potential for substantial wins, making this slot a favorite for players who enjoy mystery symbols.
6. Mystery Joker 6000 (Play’n GO)
Mystery Joker 6000 by Play’n GO is a modern take on the classic fruit machine, with the added excitement of mystery symbols. This game features a Mystery Symbol that can transform into various other symbols, offering players the chance to complete big winning combinations. The game has a straightforward design but includes plenty of ways to win, especially when the mystery symbols land. With a high RTP and simple gameplay, Mystery Joker 6000 is perfect for players who enjoy mystery features without complex mechanics.