Bolt X UP ™ – Review, Bonuses, Free Spins, Free Play in Demo Mode

Online slot Bolt X UP is a brainchild of Microgaming. It is themed around electricity and has five reels, three rows and 243 ways to win. This game has wilds that expand, have multipliers and offer free spins. It is a medium volatility game with variable RTP up to 96.22 percent.

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With a maximum win of 10,000x your stake, the Bolt X UP online slot is a sequel to Chronicles of Olympus X Up game. It has complete similarity to its forerunner in that it has medium volatility and offers high-voltage visuals and bonuses such as a multi-level “X UP” feature with an increasing multiplier.

Bolt X UP ™ - Free Play in Demo Mode

Dive into the world of Bolt X UP ™ and enjoy our exclusive Free Play in Demo mode. You can try this exciting slot without spending money to see how it works, explore its paylines, features and bonus rounds at no risk. Find your strategy in Demo mode, comprehend game mechanics and define a winning betting system for your future play. Unlock the excitement without spending a dime as you engage in Free Play, immersing yourself in the entertaining universe of Bolt X UP ™.Discover the game's unique mechanics, visualize potential winning combinations, and master your gameplay strategy—all in a no-risk environment. Try your luck in Demo mode today and prepare for an exhilarating gaming experience when you're ready to make a splash with real wagers.

Theme, graphics & soundtrack 

The Microgaming selection of slots is focused on electricity and it is set against a backdrop that suggests a mechanically-induced electric storm. The background is filled with dark blue colors, accompanied by lightening strokes while the reels exhibit strong images, which have been traditionally themed. There are icons such as bars or red Sevens that have been modified to match current types of games. If you love time travel in a slot that is looking backward but not forward then Secrets of the Phoenix Slot could be your best choice.

Bolt X UP RTP and variance

Whatever the no deposit mobile casino you opt for, it will actually make sense to attempt playing games in free demo mode. This provides the perfect chance to evaluate this game’s medium variance as well as how its alterable 96.22% payouts work in real life.

How to play Bolt X UP

Playing this online slot is as simple as it gets, but sometimes it helps to get an idea of what the controls do before you start. Here’s what to know:

  1. The three-dot tab opens the paytable and the settings menu. 
  2. Click the coin stack to set your bet per spin. The paytable will update dynamically according to how much you decide to bet.
  3. The three-arrow circle is the autoplay option. Click this and choose how many spins you want the slot to play automatically.
  4. There is a lightning tab on the main screen. Click this to turn fastplay mode on and off.
  5. If you choose to play at a faster speed, be aware of how much quicker your playing balance can disappear. Always remember to play responsibly and make use of features such as timeouts and self-exclusions if you need them.

Bet sizes & paytable wins 

With a range of slot games, you can bet from 10p to £20.00 per spin. There are winnings for matching three to five symbols, which include maximum prizes for a combination of five in the same manner as stated below:

  • Wild = 90.00
  • Diamond = 80.00
  • 7 = 60.00
  • Bar = 56.00
  • Bell = 50.00
  • Cherries = 40.00

These wins include:

  • 2x to 4x your bet for five-strong combinations of prime symbols
  • 4.5x your bet for five-of-a-kind wild wins
  • The chance to fill the screen with wilds for a 1,093x win
Max-win 10,935x
Volatility Medium
Top RTP 96.2%

Bolt X UP bonus features


Primarily, this online slot centers on its X Up feature and the scatters responsible for activating it. This is one of the main aspects of the game in which a token is placed in a meter at the side of the reels every time two scatters appear in one spin. This is how you increase the multiplier for the bonus round. Once you have accumulated 23 X UP tokens, your meter will be full and your winnings will be multiplied by 10x. It also activates a bonus round.

Bonus round

Another way this bonus can be activated is by getting three scatter symbols in the second, third and fourth reels in the base game. This leads to eight free spins. By landing a pair of scatters on the second and fourth reels as you play, you will win two more bonus games. You can also earn scatters that enhance your token meter when you are involved in free spins.


This unpaid space also comes with a feature called an upsizer that can be used to pay for an increased multiplier. The cost of the upsizer will decrease depending on how many scatter symbols have been collected. Another option is buying the bonus where you get free spins and a random multiplier between 1x and 10x.

Expanding wilds

Expanding wilds can come up on all reels, providing an opportunity to fill the entire grid with wild symbols.

Bolt X UP review: our verdict

The main aim of this Bolt X UP slot review is to provide an unbiased opinion whether you should try out this online slot. For one thing, there are so many free slots to choose from that it’s hard to know which ones to go with, but this one has a lot going for it. We have concluded that this game will be especially appealing to those who like X UP games and have been turned off by the high volatility of prior versions. This free slot is much less savage than its counterparts as a result of having medium volatility; additionally, our slot review discovered that it provides several bonus features along with a good maximum win, therefore appealing to different types of gamblers.

Disclaimer: Bolt X UP trademark / license is owned by Microgaming. This site is not endorsed by Microgaming.


What is the variance of the Bolt X UP slot?

As mentioned earlier in this slot review, Bolt X UP is a medium variance game, which means that it lies somewhere between having a high and low risk. This should provide a better equilibrium of risk to reward than its forerunners.

What is the RTP of the Bolt X UP slot?

The Return to Player percentage of this slot may be as high as 96.22%. You should know, however, that the percentage is flexible and therefore you need to look into this more closely before you play this online slot machine.

Does the Bolt X UP slot have free spins?

Certainly, in this game free spins are an extra. Starting with eight and you can earn more if you play.

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