Double Rainbow Slot Review
Hacksaw Gaming are bringing childhood dreams to life in their latest magical new release, Double Rainbow!
Remember when you were younger and you would dream of fluffy clouds, magical unicorns and super colourful rainbows? Well we didn’t but you might have. Regardless, Hacksaw Gaming has gone out of their way to make those dreams a reality in Double Rainbow.
Hacksaw Gaming is the proud owner of a variety of popular titles such as Chaos Crew, Cash Quest, and King Carrot. Where will Double Rainbow fit among these? Double Rainbow is pretty, imaginative and full of potential, with Rainbow Reels, Multiplier Clouds and the Full Rainbow feature all waiting for you to enjoy. Double Rainbow has certainly captured our attention in terms of features, but how about looks?
Although slots are for adult eyes only, the theme of Double Rainbow is quite literally every little girls dream. But since most of us are still kids at heart, we feel that this kind of theme will be as appealing to us now as it would have been when we were younger. Even though we can’t touch the background, it just looks so fluffy and soft. White fluffy clouds with a Rainbow weaving in and out is visible, along with a cute and cuddly unicorn stood in the left corner of the screen.
Double Rainbow may look dreamy, but will it end up being a terrifying nightmare? Let’s play on and find out!

Double Rainbow Betting and Symbols
Double Rainbow has a variety of betting options for players to choose from. For those who prefer a lower stake, the minimum bet available is £/€0.10 per spin. For those who prefer a higher stake, the maximum bet available is £/€100 per spin, with plenty of other options in between the two.
There is no need to look out for the highest paying symbol in Double Rainbow, this is because every single symbol is equal in terms of value.
Wilds substitute for all high and low paying symbols.
Double Rainbow Base Game and Features
Double Rainbow is a 7×6 Video Slot with a Cluster Pays mechanic. In order to form a win, you will need to connect 5 or more of the same symbols either Horizontally or Vertically.
Double Rainbow features Cascading Reels. Each time a winning combination is formed, all winning symbols will be removed from the reels and new symbols will fall down via a Cascade, filling all the empty positions and possibly creating even more winning combinations.
There is certainly a lot going on in the base game of Double Rainbow, including Rainbow Reels, Multiplier, Normal and Double Rainbow Cloud features, for you to thoroughly enjoy. Hacksaw Gaming has also included a Full Rainbow Feature. More on these below.
Special Symbols
- Multiplier Clouds – Landing a Multiplier Cloud, reveals a random Multiplier and is added to the corresponding reel Multiplier.
- Normal Clouds – Landing a Normal Cloud will activate the Rainbow Reels feature if it is not active already. It then adds a Multiplier value of x2, x3, x4, x5, x10, x15, x25, x50, x100 or x250. In addition to this, it also awards +1 Free Spin where all active Rainbow Reels remain active.
- Double Rainbow Clouds – When a Double Rainbow Cloud lands, it will award a Multiplier value of x2, x3, x4, x5, x10, x15, x25, x50, x100 or x250 to all active Reel Multipliers. In additon to this, +3 Free Spins are awarded which keeps the Rainbow Reels active.
Rainbow Reels
Double Rainbow has 7 colourful reels, one for each colour of the rainbow.
In addition to this, each reel also has its own unique Multiplier that is applied to all wins that match the colour of the corresponding reel, whilst the reel is active.
Landing a Cloud symbol on any of the reels will activate the Rainbow Reel feature for that reel.
Full Rainbow Feature
Once all Rainbow Reels are active, the Full Rainbow feature is triggered.
Once this happens, all awarded Reel Multipliers are multiplied by either x2, x3, x4, x5 or x10.
An additional +5 Free Spins are also awarded, which keeps all Rainbow Reels active.

Double Rainbow Bonus Buy
Those outside the UK may benefit from a Bonus Buy option.
- 1 Rainbow Spin – Each spin gurantees a minimum of +1 Free Spin, with 3 activated Rainbow Reels and a starting Multiplier of x4. Choosing this option will cost you 10x your current bet. The RTP for this option increases slightly from 96.38% to 96.41%.
- 4 Rainbow Spins – Each spin guarantees a minimum of +4 Free Spins, with 3 activated Rainbow Reels and a starting Multiplier of x4. Choosing this option will cost you 50x your current bet. The RTP for this option decreases slightly from 96.38% to 96.27%.
Double Rainbow: Our Verdict
We’re not quite sure who Double Rainbow is for…It can’t be for children so that just leaves Bronies? We’re joking…or are we?
Double Rainbow isn’t exactly the sort of slot that you’ll enjoy the look of if you’re a tough individual from the streets like Hacksaw Gaming’s very own Cranky and Sketchy from Chaos Crew…but I guess we were all aware that Hacksaw Gaming like to bring a diverse portfolio to the table. Chaos Crew, Harvest Wilds, Xpander, Wanted Dead or a Wild and Toshi Video Club couldn’t really be more different from each other in a lot of ways, and it would be difficult to guess that they’re all the result of the same group of individuals over at Hacksaw HQ, but they are, and we kind of love that about them.
Double Rainbow may not be quite to our taste if we’re honest (although the Piano tune does slap), but you never know what to expect, and that kind of gets you excited for the next one when you consider that it could be ANYTHING.
Potential-wise, Double Rainbow isn’t as quite as potent as some other Hacksaw titles with 5,000x win potential, but we doubt anyone would mind too much if they were to bag themselves a cool £/€1,000 on the minimum stake. It’s hard to envision a scenario where 5,000x might happen though, if we’re honest.
Double Rainbow has no ‘Free Spins round’, but rather a Rainbow Spins round that would be relatively cheap to buy if you’re within an area that allows bonus buys.
Overall, If you can bear the sickly taste of love and affection that inevitably goes hand in hand with ponies, then you might well enjoy Double Rainbow. We’re sure the Double Rainbow guy from YouTube would love it, but everyone else may be on the fence.
Frequently Asked Questions
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What is the RTP of Double Rainbow?
Double Rainbow has an RTP of 96.38% in the base game, making it a fairly standard return-to-player rate for online slots. This means that on average, players can expect to return 96.38p for every £1 wagered. The RTP slightly increases to 96.41% when using the 1 Rainbow Spin bonus buy option. -
What is the maximum win on Double Rainbow?
Double Rainbow has a maximum win potential of 5,000x your stake, which translates to £/€500,000 at the highest bet of £/€100 per spin. With the minimum bet of £/€0.10, a 5,000x win would return £/€500, offering exciting win potential across all bet levels. -
Are there free spins in Double Rainbow?
Double Rainbow features a Rainbow Spins round rather than traditional free spins. Players can trigger free spins through Cloud symbols landing during base game play—Normal Clouds award +1 Free Spin, Double Rainbow Clouds award +3 Free Spins, and the Full Rainbow feature awards +5 Free Spins. All active Rainbow Reels remain active throughout the free spin rounds. -
Can I play Double Rainbow on mobile devices?
While the review content does not explicitly state mobile compatibility details, Double Rainbow is a modern Hacksaw Gaming title released in March 2022, and contemporary online slots are typically optimized for mobile play. We recommend checking with your preferred online casino to confirm full mobile device compatibility before playing. -
What is the Bonus Buy feature in Double Rainbow?
Double Rainbow offers two Bonus Buy options for players outside the UK. The 1 Rainbow Spin costs 10x your bet and guarantees a minimum of +1 Free Spin with 3 activated Rainbow Reels and x4 starting multiplier. The 4 Rainbow Spins option costs 50x your bet and guarantees a minimum of +4 Free Spins with the same multiplier features, allowing you to skip the wait for free spins in the base game. -
What is the volatility of Double Rainbow?
Double Rainbow has Medium volatility, making it a balanced choice for players seeking neither extreme high-risk gameplay nor very frequent small wins. This volatility level suits both casual players and those with moderate bankroll management, offering reasonable chances of landing winning combinations without requiring extreme patience or aggressive betting strategies. -
What makes Double Rainbow unique?
Double Rainbow’s standout feature is its Rainbow Reels system, where each of the 7 reels represents a different rainbow color with individual multipliers. The Full Rainbow feature is triggered when all reels are activated, multiplying all reel multipliers by x2, x3, x4, x5 or x10 and awarding +5 Free Spins, creating dynamic and potentially lucrative win opportunities during Rainbow Spins rounds. -
What are the betting limits for Double Rainbow?
Double Rainbow offers flexible betting with a minimum bet of £/€0.10 per spin for cautious players and a maximum bet of £/€100 per spin for those seeking higher stakes. This wide range accommodates all player types, from penny slot enthusiasts to high-rollers, with plenty of bet options available between the two extremes.

