Double Rainbow Slot – Free Demo

A 7x6 Grid of Colour-Coded Reels

Studio Hacksaw Gaming are back with their slot Double Rainbow, and the excitement is supplied chiefly from Clouds landing on the Rainbow Reels. They contribute multipliers across a play board. The game has 7 Rainbow Reels, one for each colour of the rainbow. It is a board featuring a cluster pays win system, extra spins, and escalating multipliers. King Carrot and Dork Unit are also Hacksaw Gaming games.

The excitement happens on a 7x6 proportioned matrix. That matrix is tossing in 42 colour-based symbols with every spin. I played 330 spins at 20.00 each, wagering 6,600.00 in total from a starting balance of 5,000.00.

Beneath it runs a typically harsh maths model. My session finished with the balance at 33,314.00, having won 34,914.00. Operating at a volatility of 4 out of 6 and yielding an RTP figure of 96.39%, it is a model where fortune runs hot or cold, to be certain, but Double Rainbow ran hot for me, landing 1,283x the stake on spin 14 and completing 330 spins at a 529% yield. That spin paid 25,660.00 and took the balance to 30,422.00. Wins happen when clusters of 5 or more identical symbols join horizontally or vertically, this being a matrix slot, and winning clusters burst from the matrix, permitting fresh symbols to fall down into the vacant cells. A shape joined only diagonally does not count as a winning cluster. That procedure recurs, accumulating wins until no fresh clusters emerge. Multiple wins in one round are added together.

Double Rainbow's paytable contains a red square, orange round, yellow drop, green heart, blue star, pink moon, and purple tulip. All of them are awarding the same, and part of Double Rainbow's difficulty is its comparatively scant symbol values. A cluster of 5 symbols pays 0.1x the stake, and a cluster of 8 or 9 pays 1x. Land a cluster of 15 or more identical symbols to be granted a prize worth 50 times your stake. A cluster of 12 to 14 pays 10x the stake. There is a wild. It substitutes for all paying symbols.

Clouds, Multipliers and Extra Spins

One of the earliest things you spot when Double Rainbow begins spinning is the Rainbow Reels, each of which holds a Reel Multiplier and is joined by extra spins, as well as two bonus buy choices. Each Rainbow Reel's multiplier applies only while that reel is active.

Beginning with the multiplier, a reel awakens when a Cloud lands on it, and if a winning cluster is of that reel's hue, the win is multiplied by the Reel Multiplier's worth. A Cloud landing on a reel that is already active adds its value to that reel's existing multiplier. A Normal Cloud contributes 2x, 3x, 4x, 5x, 10x, 25x, 50x, 100x or 250x to its reel. Separate reels hold separate multipliers, so values such as 5x, 5x and 10x can be active on three reels at the same time. A Double Rainbow Cloud contributes one of the identical values to all live Reel Multipliers, and you can hold up to 7 live multipliers. They restart every fresh round.

Clouds also award extra spins, with triggered Rainbow Reels held live, and depending on what lands, you receive extra spins correspondingly:

• Normal Cloud - 1 extra spin.
• Double Rainbow Cloud - 3 extra spins.
• Full Rainbow (all Rainbow Reels live) - 5 extra spins, with all Reel Multipliers multiplied by x2, x3, x4, x5 or x10.

Double Rainbow permits players to purchase one of two FeatureSpins if you're not in the mood to hang around for Clouds to fall naturally. When FeatureSpins are active, each spin guarantees certain features and costs a set amount based on the current bet level. These are 1 Rainbow Spin or 4 Rainbow Spins.

Our Minty Verdict: Spin 14 paid 1,283x the stake, and that single round carried most of the 529% my 330 spins returned; the paytable alone tops out at 50x, so every result that mattered went through a Reel Multiplier.

Where the Rainbow Pays Out

Of course, the exterior shell of a slot is no sign of what is unfolding beneath the facade, and there I discover a maths model that is as harsh and possibly rewarding as you could conceivably desire it. My balance bottomed out at 4,782.00 and peaked at 34,592.00 on spin 156, the spin that paid 5,640.00. First, there's the Clouds triggering Reel Multipliers on every reel they land on. One thing to be sure on is Reel Multipliers only count to wins of their reel's colour, so the multiplier either lifts a cluster of its colour, or you get zilch from it. This might not be obvious at first. Yet it's no showstopper once you've come to terms with the restrictions, and the other thing to bear in mind is the modest values of the clusters. A cluster of 10 or 11 symbols pays 3x the stake. Every paying symbol provides merely 50x the wager for a bunch of 15+. That seems a touch off when compared to a host of other cluster pays slots, and it makes the Reel Multiplier mechanic even more all-or-nothing. In my session, 83 of the 330 spins paid, and 46 of those returned less than the stake. Seeing your balance performing its best 'faded rainbow' imitation when they don't land your way for prolonged spells can be trying. My longest run without a win lasted 13 spins, ending on spin 92.

As always, the extra spins are where your fortune has the opportunity to shift, and when luck's grinning, there can be a heap of multipliers on-screen lifting wins. An extra spin keeps every activated Rainbow Reel live, so the Reel Multipliers carry from one spin to the next within the round. That is up to a max win of 5,000x the stake.