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Rainbow King

Rainbow King Overview

Rainbow King Slot


Available on Mobile NO
Variance Low-Med
RTP 95.00%
Pay-lines 20
Free Spin Bonus NO
Stacked Wilds NO
Expanding Wilds NO
Scatter Symbol NO
No. of Jackpot Tiers NOT APPLICABLE
Provider Rainbow King
Game Type Vegas Slots
Jackpot Yes

Play Rainbow King on these sites

  • £200
  • Welcome Bonus
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New customers only. Opt-in required. 1st deposit bonus 100% up to £200. 2nd deposit bonus 50% up to £200, 3rd deposit bonus 25% up to £200, 4th deposit bonus 25% up to £200. 40x wagering, 30 days to complete wagering, game weighting and game restrictions apply. Max Bet with bonus funds £5. Neteller/Skrill deposits excluded, cash balance can be withdrawn at any time. Full bonus terms. Read more

  • £50
  • Welcome Bonus
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You understand that Bonuses and Rewards are subject to certain conditions. Unless otherwise informed in the applicable conditions, the general rule at Casumo is that Bonuses carry a wagering requirement of thirty (30) times the total amount, e.g. if you deposit €10 and obtain a €10 bonus, you would have to wager 30 times the aggregate amount, in this case being €20 (deposit + bonus). Winnings from Free Spins have a wagering requirement of thirty (30) times. Should you decide to request a withdrawal before having fulfilled the respective wagering conditions, the bonus money shall be lost. Please make sure to refer to and understand the rules and requirements of all the different bonuses and rewards. Read more

  • £500
  • Welcome Bonus
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BONUS TERMS – This offer is only available to customers residing in United Kingdom. – The Dunder welcome package consists of 3 deposit bonuses: 1st deposit gives you 200% up to £50, 2nd 50% up to £150 and 3rd 25% up to £400. – In order to get the welcome bonuses you must activate them, either from “Home” or the deposit page. – In addition to deposit bonuses you are also eligible for 200 freespins on Starburst. 20 free spins upon registration and 20 free spins every day for 9 days from your first deposit (activated at 01:00 CET). – The daily free spins are added automatically, just start Starburst. free spins that hasn’t been activated within 24 hours after receiving them will vanish. – The free spins on registration must be activated through the “Home” screen. Read more

  • £100
  • Welcome Bonus
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Rainbow King review

Rainbow King is a very bright, colourful twenty win-line, £500 jackpot game from Astra. It’s popularity is rather impressive, featuring on the majority of fixed odds betting terminals, as well as in amusement arcades, and many on-line casinos.

The FOBT and arcade versions offer play at £1 per spin (many now offer a £2 per spin upgrade). The online version however, allows you to change the stake and the amount of win-lines, allowing the player to play the game for as little as 1p per win-line per spin, and up to £20 per win-line multiplied by the twenty lines for an incredibly £400 per spin! This not only bumps the jackpot up to £200,000, but it also bumps up the percentage payout. If you claim the £10 free play bonus, you could have at least 1000 spins at a penny a go allowing you to explore the features, and playing style of this game.

Just like the majority of £500 jackpot slot machines, Rainbow King has three features, two fairly common, and one super. The most fun is the games namesake Rainbow King. Three or more King icons anywhere in view trigger the Rainbow King Feature. Here, you move a character over the game board by rolling a dice, and can pocket different winnings on each square. When your game character lands on a Rainbow King square, a small slot game is activated which you can play when your game character lands on a “Take the Money” square. It is a fairly interactive feature, which is rare for £500 machines. If you remember the old Astra multi-player sit down game with nurses, cowboys, the devil and a pirate. The Rainbow King feature is an upgrade from that. You can win up to £500 from this feature, with even just three of the symbols. Four and five in view upgrade the cash amounts.

Bonus Games

Cash Castle is the plain old pick me feature found on almost all £500 jackpot machines. A minimum of three in view, up to five, offers one pick of a castle. A hidden value will then be revealed. The only version offers a multiplication of the bet value, for example 100x will pay 100x your stake.

The main super feature is King Cash. This is awarded by landing three golden crowns on the centre three reels, in much the same way as Pots of Gold from Rainbow Riches. This then open up a screen of twelve crowns, each with a different cash value. You only have one pick, but the board is entirely random. The lowest value is £50, with the highest been the jackpot. All the rest contain everything in between. The £200,000 jackpot is available from this feature in on-line play. As well as the three features, wins also roll in along the pay lines. These can pay any amount up to the jackpot, but you are more likely to win the £500 from one of the features.


All in all this is a good fun, bright slot machine that plays a fair game, and offers chances to win big.