Big X Slots Review - Mystery Symbols, Re-Spins & Multiplying Lines

Big X Slot - Editor's Comment

Big X is a game that knows exactly what it is: a stripped-back fruit slot with a few modern twists. The 3x3 grid and five paylines keep things simple, but SYNOT has layered on mystery symbols, multiplying lines and a re-spin feature that triggers when the Big X symbol lands on the centre or middle reel. The result is a game that feels familiar but has enough going on to hold your attention.

The appeal here is the balance between simplicity and reward. Lines four and five double any win scored on them, and the mystery symbol can award a random payout from the paytable. The re-spin feature, triggered by the Big X symbol, holds that symbol in place while the reels spin again, giving you a second chance at a win. It is not a complex game, and it does not pretend to be.

Where Big X stumbles is in its RTP range. The top version sits at 98.01%, which is excellent, but SYNOT has released multiple versions with lower RTPs, so the version you play matters. The game also lacks a traditional free spins bonus round, which may disappoint players used to more feature-heavy slots. But for what it is, Big X delivers a solid, no-frills experience. SlotCatalog's analysis

What We Liked

• Top RTP of 98.01% on the best version
• Multiplying lines four and five add extra value to wins
• Mystery symbols can award random payouts from the paytable
• Re-spin feature triggered by the Big X symbol
• Low minimum bet of 0.10 credits makes it accessible

What is the Big X Slot?

Big X is a classic video slot developed by SYNOT Games, a studio known for retro and fruit-themed releases. It uses a 3-reel, 3-row layout with five fixed paylines, orientated from left to right. SlotCatalog

The theme is unapologetically retro. Symbols include diamonds, red sevens, bells, watermelons, grapes, plums, oranges, lemons and cherries. The background evokes a land-based casino floor, and the flashing colours are designed to trigger nostalgia for players who miss the physical slot machines. There are no wild symbols in Big X, but the game compensates with mystery symbols and the Big X re-spin feature.

The game is optimised for HTML5, meaning it runs smoothly on mobile and desktop without the need for downloads or plugins. The active paytable is displayed on the left side of the reels, showing all potential payouts as multipliers of your total bet.

Big X Slot Machine At A Glance

The table below summarises the key specifications for Big X. All figures are based on the top RTP version of the game.

It is worth noting that SYNOT has released multiple RTP versions of Big X. The 98.01% figure represents the highest configuration, but lower-RTP versions also exist. Always check the game's information screen at your chosen casino to confirm which version you are playing. SlotCatalog

Big X Slot RTP, Payout and Volatility

Return to Player (RTP) is a theoretical measure of how much a slot pays back to players over the long run. It is calculated across millions of spins and does not predict what will happen in any individual session. A game with 98.01% RTP returns €98.01 for every €100 wagered over that extended period, but your actual results will vary significantly in the short term.

Big X has a top RTP of 98.01%, which is well above the industry average of around 96%. However, the game also exists in lower-RTP versions, and players should be aware that not all Big X games are created equal. The version you encounter depends on the casino's configuration. SlotCatalog

Volatility is rated as low to medium by SYNOT, so wins tend to arrive more often but are usually smaller than on high-volatility slots. The maximum win is 500x your total bet, and the Big X re-spin can extend a round by holding the triggering symbol while the other reels spin again. This Week in Gambling's review

The paytable shows diamonds as the highest-paying symbol at 50x your bet, followed by red sevens at 30x and bells at 20x. Watermelons and grapes pay 10x and 5x respectively, while plums and oranges pay 3x, and lemons and cherries pay 2x. Wins on paylines four and five are doubled.

How to Play Big X

Big X is a straightforward game to play, whether you are new to slots or a seasoned player. Here is a step-by-step guide:

1. Set your bet. Use the controls beneath the reels to adjust your stake. The minimum bet is 0.10 credits and the maximum is 100 credits per spin.
2. Check the paytable. The active paytable is displayed on the left side of the reels. It shows all potential payouts as multipliers of your total bet, so you know exactly what each symbol combination is worth.
3. Spin the reels. Click the Spin button to start a round. You can also use the Autoplay function if you prefer to let the game run automatically for a set number of spins.
4. Watch for mystery symbols. Landing three mystery symbols anywhere on the reels awards a random payout from the paytable.
5. Look for the Big X symbol. If the Big X lands on the centre or middle reel, the re-spin feature triggers. The Big X symbol is held in place while the other reels re-spin, giving you another chance to form a winning combination.
6. Consider the gamble feature. After landing a winning combination, you have the option to gamble either part or all of your winnings. This is a risk-reward mechanic that can increase your payout but may also result in losing the win.

There is no strategy that can guarantee a win on Big X or any other slot. The game uses a random number generator to determine outcomes, and each spin is independent of the last. The best approach is to set a budget before you play and stick to it.

Big X Gameplay, Graphics & Sound

Big X leans heavily into its retro aesthetic. The 3x3 grid is framed by a rich patterned background that evokes the feeling of a land-based casino floor. The symbols are classic fruit machine icons: diamonds, sevens, bells, watermelons, grapes, plums, oranges, lemons and cherries. The colours are bright and the animations are simple, which suits the game's no-nonsense approach.

The sound design follows the same philosophy. There are no elaborate soundtracks or cinematic effects here, just the familiar clicks and chimes of a traditional slot machine. It is not going to win any awards for innovation, but it does create an authentic retro atmosphere.

The game runs on HTML5, which means it performs well on both desktop and mobile devices. There are no downloads required, and the interface is responsive. The controls are positioned beneath the reels and include the Spin button, Autoplay and Max Bet options. The paytable is always visible on the left side of the screen, so you can refer to it without interrupting your session.

Big X Slot Features

Big X keeps its feature set lean, focusing on a few mechanics that add variety without overcomplicating the experience. The main features are mystery symbols, multiplying lines and the Big X re-spin.

Mystery Symbols

Landing three mystery symbols anywhere on the reels awards a random payout from the paytable. This is a scatter-style feature that does not require the symbols to land on a specific payline. This Week in Gambling's review

Multiplying Lines

Big X has five paylines, but lines four and five are enhanced. Any win scored on these lines is doubled. This adds extra value to certain combinations and gives players a reason to pay attention to which lines are active.

Big X Re-Spin

The headline feature is triggered when the Big X symbol lands on the centre or middle reel. The symbol is held in place while the other reels re-spin, giving you a chance to form a winning combination with the Big X symbol as part of the line. Casino City's game page

Gamble Feature

After landing a winning combination, you have the option to gamble either part or all of your winnings. This is a standard risk feature that gives you the chance to increase your payout but also carries the risk of losing the win entirely.

Bonus Features: Wilds, Multipliers, and Free Spins

Big X does not have a traditional wild symbol that substitutes for other symbols to form winning combinations. It also does not have a conventional free spins bonus round. This is a deliberate design choice that keeps the game focused on its core mechanics rather than layering on additional features.

What Big X does offer is a mystery symbol that awards random payouts, multiplying lines that double wins on paylines four and five, and a re-spin feature triggered by the Big X symbol. These features serve a similar purpose to wilds and multipliers in other slots, but they are implemented in a way that suits the game's retro, stripped-back style.

Players who prefer slots with free spins, expanding wilds or cascading reels may find Big X a little light on features. But for those who appreciate a classic fruit slot with a few modern twists, the mystery symbol and re-spin mechanics provide enough variety to keep things interesting.

Where to Play Big X

Big X is available at a range of online casinos that carry SYNOT Games content. Availability varies by jurisdiction, and not all casinos carry every RTP version of the game. Casino City's listing

Players should check whether a casino is licensed to operate in their jurisdiction before signing up. Always confirm the game's RTP in the information screen before playing, as the version offered can differ between casinos.

If you want to try Big X without risking real money, some sites offer a free demo mode. Our free demo slots page explains how demo play works and where to find it.

Other Slot Games You Might Enjoy

If you like the sound of Big X, you might also enjoy these classic-style slots from our reviews:

• Fruit Burst Slot Review: another fruit-themed slot with simple mechanics
• Red Diamond Slot Review: a classic slot with a diamond focus
• Super Lucky Reels Slot Review: retro reels with modern features
• Cherry Trio Slot Review: a three-reel slot with a fruit theme
• Classic Slots: 3-Reel Games: browse our full collection of classic slots