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4 Reel Kings

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4 Reel Kings is a special video slot machine made by Novomatic. This is in fact a tribute to the well-known slot Reel King, that is made by the same provider. If you've ever played Reel King, then you will instantly understand how the game works. It is basically the same game, but instead of playing at one reel set, 4 Reel Kings let you play on 4 different reel sets. The payout table is just the same as on the original version. The special thing about this slot machine is that you can activate the bonus in an additional way. During the period you spin each of the 4 reel sets, it's possible to highlight one or more symbols in the "4 REEL" text above the slot machine. If you manage to highlight the whole word, the bonus is triggered. The payout percentage is at the same level as the original game.

Game data

Slot name



Release date


Free spins

Bonus game


4 Reel Kings Greentube / Novomatic 94.00% 2014 20x4




This slot machine is available on these casino platforms:
Computer, Mac, iPad, iPhone and other mobile devices.

18+ required - New customers only - BeGambleAware - T&C apply!


Read more about the game features below the screenshot!

Game screenshot

Game features

Let me first of all explain how the 4 reel sets work. You place a bet just like you do on a normal slot machine, but your first spin will only spin the first reel set. If you spin again the second reel set will spin, and so on. During the 4 spins from the first to the last reel set, it's possible to highlight the "4 REEL" text at the top of the screen. If this is done the bonus game is triggered.

4 Reel Kings has wild symbols on reel 3, 4 and 5 on all the reel sets, these symbols substitute for all other symbols in play. The maximal potential win is 500x the stake per reel set, and it's won by filling the entire screen with money bag symbols. It's also possible to win this prize within the bonus game that can be triggered each of the reel sets. If you don't win the bonus game during the normal spins, it can also be activated by lightening the "4 REEL" text on top of the slot.

After a winning spin is finished, it's possible to gamble the wins in a true chance 50/50 gamble game. Unlike other Novomatic games, it's not a card game, but a pyramid of flashing lights. If you click stop while the first step of the pyramid is lit, you have doubled your win. If you don't manage to lit it, the win is lost. The number of layers in the pyramid depends on the win, and you can never gamble a win higher than 500x the stake.

Bonus game: There are two ways to trigger the bonus game. Just like on Reel King, the bonus game can be triggered by sounds! So there's no need for scatters or bonus symbols. You basically need a combination of 5 melodies when the 5 reels stops. The other way to trigger the bonus is by lighting the "4 REEL" text on top of the slot, this text can be lit fully or partly during a spin on one of the reel sets. If it is lit partly, you need to lit the rest of it during the remaining spins on the other reel sets. The lights will be turned off when the spin on the 4th reel set has finished.

One of the above combinations will trigger a bonus game where between 1 and 5 mini slots will appear on the screen. The symbols on the slots contain of blue, yellow and red sevens, but also a black diamond symbol. As long as you get any combination of 3 sevens on the reel set, you get another spin. The maximal win per bonus round is 500x the stake per spin. A mix of sevens pay 2x the stake, blue sevens pay 5x the stake, yellow sevens pay 10x the stake, while the red sevens pay 25x the stake. It's possible to win the bonus game once per reel set, so it's possible to win the maximal prize of 500x the stake 4 times during the four spins from the first to the last reel set.

Casino to play at / Provider

4 Reel Kings is created by Greentube.
Read more about Greentube!

18+ required - New customers only - BeGambleAware - T&C apply!


18+ required - New customers only - BeGambleAware - T&C apply!

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