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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

  • £100
  • Welcome Bonus
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New players only, Maximum bonus is £123, Max bet with bonus is £5, No max cash out, Wagering is 50x – Skrill & Neteller excluded, Eligibility is restricted for suspected abuse, Cashback is cash, so no wagering, Cashback applies to deposit where no bonus is included. Full T&C’s apply. Read more

  • £100
  • Welcome Bonus
Visit Casino

Minimum deposit: £20. 20 spins in Book of Dead on reg. 100% bonus up to £100 and 100 bonus spins. First 50 bonus spins credited on deposit, Second 50 bonus spins credited the following day. Valid on first deposit only. Wagering on reload bonus: 60x. Wagering on bonus spins: 30x. Wagering must be completed within 30 days. Max bonus bet £5. Bonus is valid for a total of 21 days. Further T&Cs apply. Read more

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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.