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Rainbow King slot

We would like to demonstrate so unusually Rainbow King slot from Greentube which offers you to immerse into the world of excitement. In this machine, there are five reels, 20 lines and four bonus games. In each of them, you can derail good winnings. We suggest getting acquainted with the opinion of the tester. And you have the opportunity to play the demo of this slot for free and without registration on the top of this page.

Personal testers opinion

Rainbow King slot machine has excellent bonus features. All of them are launched at a high frequency, so you do not have to wait for a trigger it for a long time. Thanks to these functions, I managed to get good awards. Despite the low percentage of the slot's return, winning combinations are quite common. There is no classical risk-game here. The colourful and bright design will give you a chance to relax and enjoy.

Hidden parameters and settings of Rainbow King slot (data from testing)


  • Number of reels - 5
  • Number of pay lines - 20
  • The rate on the line is from 0.02 to 5.00
  • The range of bet sizes is from 0.40 to 100.00
  • Maximum winning for a combination from 5 symbols – 2 500 coins
  • Wild symbol - yes (an inscription of WILD)
  • Bonus game - yes (3 bonus symbols (Corona, Lock, Rainbow King) will start the prize-winning games)
  • The expected percentage of RTP payments in the slot is 95%


The main feature of the slot machine is the availability of four bonus features:

  • Cash Castle starts when three or more Lock symbols appear. This option allows you to win from 2 to 500 total rates. You need to choose one of the fallen castles, behind it the prize is hidden.
  • Rainbow King. Three or more symbols of King triggers this feature. There will be an additional screen with a chest and a dice in the middle, around which there are cells with prizes. Press the start button, and the game will start. If you get to the cell with the image of the King, an additional round of Reel King Spins will be launched. If on the cell with the inscription Take the Money, the game will end. Other cells bring winnings of different sizes.
  • Reel King Spins. A mini-slot with three reels will appear on the screen. They are spinning multi-coloured sevens, which give winnings. You can get up to 2500 coins if the game is played at the highest rate. The mini-slot will spin until the winning combinations are dropped.
  • King Cash starts when the Crown symbol appears on the three central reels. The crowns appear on the screen, and you have to choose one. The prize may be hidden behind it - from 50 to 500 total rates.

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