Rainbow Riches Reels of Gold is a Barcrest-powered slot with 10 reels and 100 paylines – it can be played from 10p to £500 per spin across desktop, mobile and tablet devices. The game incorporates one of the best known online slot brands with the Colossal Reels game engine from WMS.

In terms of design, its colourful and still has that Irish luck theme with 4-leaf clovers, horseshoes, harps, mushrooms and rainbows. The lucky leprechaun is the highest value symbol rewarding you with 500 times your line bet if you manage to get 5 on a payline – he also appears stacked on the reels.

The first thing you will notice is the unusual reel layout – it has a 5×4 reel set to the left with a 5×12 Colossal Reel set to the right. If you’ve played games like Epic Monopoly II or Spartacus Gladiator of Rome from WMS, you’ll be familiar with the layout.

The Rainbow Riches symbol become wild when part of a winning combination – it substitutes for all symbols except the Free Spin symbol too. Look out for a full reel of Rainbow Riches symbols on the main reel set as each stacked reel transfers over to the corresponding reel on the Colossal Reel set – if you get 2 or 3, prepare yourself for big wins.

In the base game, look out for the magical fairy which randomly appears to give you access to 7 mini-features – all the details are as follows:

  • Super Stacked Wilds feature – the fairy strikes the main reel set with 1 or more reels filled with stacked Rainbow Riches symbols. This then transfers over to the Colossal Reel set turning those reels fully wild.
  • Magic Wilds feature – the fairy strikes both reel sets with blocks of Magic Wilds appearing. The slide up and down on their reel and lock in position turning the reel position wild.
  • Wild Burst feature – the fairy strikes the reels with butterflies landing on both reel sets. The symbols covered by the butterflies transform into wilds.
  • Wishing Well Bonus feature – the fairy strikes both reels with all heart, club, spade and diamond symbols transforming into Wishing Well symbols. These can then change into the higher value mushroom, harp, horse show, shamrock or wild symbol for bigger wins.
  • Reel Win Multipliers feature – the fairy strikes the reels and reward you with a multiplier of 2x, 3x or 5x which is then applied to your winnings.
  • Near Miss Free Spins feature – when you get 2 Free Spins bonus symbols, the fairy can strike the reels and add more bonus symbols which will in turn trigger the Free Spins feature (described below).
  • Near Miss Win feature – the fairy strikes the reels causing them to shift in order to give you a winning spin.

The main attraction is the Free Spins feature which can be accessed directly by getting 3 or more balloons bonus symbols – the number of balloons symbols you get will determine how many picks you get:

  • 3 symbols gives you 10 times your stake and 1 pick from 3 balloons
  • 4 symbols gives you 25 times your stake plus 2 picks from 4 balloons
  • 5 symbols gives you 200 times your stake and 3 picks from 5 balloons
  • 6 symbols gives you 200 times your stake and 4 picks from 6 balloons.

More picks gives you a better chance of getting more free spins. Before the free spins play out, you can gamble your way to more free spins or play with what you’ve been awarded. If you decide to gamble, you will see 5 dials offering a different number of free spins – if the arrow lands on green, you will win the free spins tally shown. If it lands on red, you will be taken back to the base game.

There’s more – there is also a Big Bet Mode feature which appears in other Barcrest titles – you will get a series of 5 linked spins at a much higher stake. If you get the £10 option, any Rainbow Riches wilds than land on the main reel set will transfer to the corresponding Colossal Reel and expand.

The £15 option sees exactly the same but you will get between 10 and 50 free spins if you light all 7 bonus symbols icons. The £20 option also sees wilds expand on the Colossal Reel set but lighting 6 bonus symbols icons will give you between 15 and 50 free spins. The £25 option also sees Rainbow Riches symbols expanding to fill the corresponding Colossal Reel and turning wild. However, lightning just 5 bonus symbols icons will give you between 20 and 50 free spins.

Now, the higher your bet, the better your chances of winning – playing at under £2 per spin will see the Return to Player % at 94%. This increases to 96% if playing over £2 with any of the Big Bet Mode options increasing it to 98%! It can be lucrative but the Big Bet Mode options don’t come cheap.

I love the fact Scientific Games has taken a popular brand in Rainbow Riches and made it a Colossal Reels slot – the variance is the middle with big wins available in all features. The maximum win is 500 times your stake per spin with the Free Spins feature the likeliest route.

I really like the Super Stacked Wilds feature as I’ve benefitted from 3 fully wild reels before resulting in huge wins. Overall, I would say Rainbow Riches Reels of Gold is the best Rainbow Riches slot to be released.