Big X

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Rules and Gameplay

The Big X slot machine, developed by SYNOT, is a classic-themed online slot game that offers a seamless blend of traditional and modern slot mechanics. It features a straightforward 3-reel and 3-row grid with 5 paylines, where wins are oriented from the far left to the right. Players can enjoy the game on any device thanks to its flawless HTML5 optimization. The betting range is quite broad, starting from $0.10 to $100 per spin, making it suitable for both beginners and seasoned gamblers. The game lacks wild symbols but compensates with engaging gameplay dynamics.

Bonus Features

Big X stands out with its variety of bonus features that enhance the gaming experience. Below is a list of the key bonus features:

  • Mystery Symbol: Acts as a scatter and can appear anywhere on the grid. Landing 3 triggers a feature that awards a random paytable prize.
  • Big X Feature: Activates when the bonus X symbol lands in the middle of the grid, introducing a new set of reels where the X symbol locks in place, leading to potentially lucrative respins.
  • Gamble Game: Offers a chance to double wins up to $125,000 by guessing the color of a face-down card. This can be repeated up to 10 times in a row.
  • Multiplying Lines: Wins on lines 4 and 5 are doubled, adding an extra layer of excitement to the gameplay.

These features, especially the Big X and Mystery Symbol features, provide players with significant winning opportunities and add depth to the game’s strategy.


The Big X slot game is adorned with classic gambling symbols, alongside some unique ones that play a special role in the game. Here’s a detailed list:

  • Diamonds, Red Sevens, and Bells: The highest-paying symbols, offering payouts of 50x, 30x, and 20x the bet, respectively.
  • Fruit Symbols: Watermelon and Grapes pay 10x and 5x, while Plums and Oranges offer 3x, and Lemons and Cherries provide 2x the bet.
  • Mystery Symbol: Acts as a scatter and awards random prizes from the paytable.
  • Special Bonus X Symbol: Triggers the Big X feature for enhanced winning opportunities.

These symbols, combined with the game’s bonus features, create a rich tapestry of winning possibilities for players.


Big X slot’s payout structure is designed to reward players generously through its variety of symbols and special features. Below is a table highlighting the payouts for key symbols:

Symbol Payout (x bet)
Diamonds 50x
Red Sevens 30x
Bells 20x


Big X features 5 paylines across its 3×3 grid, enhancing the classic slot experience with modern twists. Lines are counted from the far left to the right, with lines 4 and 5 offering an x2 multiplier for added excitement and winning opportunities. This structured payline system, coupled with the game’s bonus features, makes for engaging gameplay and strategic betting opportunities.

Pros & Cons

Pros Cons
Classic slot machine design with modern features Lacks free spins and wild symbols
Wide RTP range offering up to 98.01% High RTP variants may be rare at casinos
Features like the Big X and Mystery Symbol add depth to gameplay Base game payouts might not be high for all players

Minimum and Maximum Bet

The betting range in Big X caters to a wide variety of players, starting as low as $0.10 and reaching up to $100 per spin. This broad range makes the game accessible for casual players while still offering the high stakes that seasoned gamblers look for.

Game Jackpot

The maximum win in the Big X slot game is 500x the total bet. Alongside this potential jackpot, the game features an RTP (Return to Player) that varies widely from 85.05% to an impressive 98.01%, depending on the variant chosen. The variance is classified as low to medium, which suggests that wins can occur with a moderate frequency, balancing the risk and reward for players.

About Provider

SYNOT Games is a reputable developer in the online casino industry, known for producing slots that blend classic themes with innovative gameplay features. Headquartered in Bratislava, Slovakia, SYNOT has been actively releasing new titles since the beginning of 2023, showcasing their commitment to quality and player satisfaction. Their portfolio is diverse, aiming to cater to a wide audience with varying tastes in slot games.

How To Play

  • Start by selecting your bet size. You can adjust your bet from $0.10 to $100 per spin to suit your budget.
  • Press the Spin button to start the game. The reels will spin and then come to a stop, revealing if you have won any prizes based on the paylines.
  • Look out for the Mystery Symbol and Big X feature. Landing three Mystery Symbols anywhere on the reels awards a random prize, while the Big X feature is triggered by the bonus X symbol landing in the middle of the grid.
  • Use the Gamble feature wisely. After any win, you have the option to gamble your winnings on a double-or-nothing bet based on the color of a hidden card.
  • Pay attention to the paylines. Wins are counted from the left to the right, with certain lines offering multipliers for increased winnings.


Big X from SYNOT Games is a classic slot machine reimagined with modern twists that cater to both new and seasoned players. With its wide betting range, high RTP options, and engaging bonus features, it presents a compelling blend of traditional and innovative gameplay. While the game lacks certain elements like free spins, its unique features like the Big X and Mystery Symbols provide depth and exciting winning opportunities. As always, SYNOT’s commitment to quality is evident, making Big X a worthy addition to any slot enthusiast’s playlist.