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4 of a King Slot - Review, Free & Demo Play

4 of a King
4 of a King
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Updated: 22.07.2025
Reviewed by: Fabio Duarte
4 of a King is a slot by Endorphina released on 15/11/2014. The theme of the title is dedicated to land-based casinos, so if you are not indifferent to the enchanting atmosphere of gambling houses, love the quiet rustle of cards and the clink of champagne glasses, this game is for you. To find out full information about the slot, including the features of its bonuses, be sure to read our review to the end. We have also posted a 4 of a King demo on this page.

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In this review
  1. Slot details
  2. Theme
  3. Bonus Rounds & Free Spins
  4. Summary
  5. Where to play
General information about 4 of a King slot

General information about 4 of a King slot

Rating by Fabio Duarte:
6.1
User’s Rating: (based on  reviews):
0.0
Endorphina
Write a review +25 SJ points
  • Release Date:
    15.11.2014
  • Volatility:
    High
  • RTP:
    96.1%
  • Multiplier:
    Yes
  • Max. win:
    1,000x
  • Bonus game:
    No
  • Free spins:
    No
  • Scatter Symbol:
    No
  • Wild symbol:
    Yes
  • Symbol Stacked:
    No
  • Jackpot Game:
    No
  • Slot lines:
    10
  • Slot reels:
    5
  • Layout:
    5-3
  • Stakes range (€/£/$):
    0.01 to 100
  • Slot Theme:
    Casino
  • Technology:
    HTML 5
More infoLess info

Licensed and tested by

  • GLI (Gaming Labs Certified)
  • ISO 27001
  • MGA
  • ONJN
  • Spel inspectionen

How to Play

To start spinning the 5x3 reels, you need to follow a few steps:

  1. Open the slot on the screen and click on it
  2. Wait for it to fully load
  3. Bet between €0.01 and €100
  4. Click on "Spin" to start the game

There are 10 non-fixed lines in the slot. You can choose how many of them you want to make active for the game. Winning combinations are made up of 7 prize symbols, including 4 low and 3 high. Wild appears in random places on the reels and replaces other elements to improve combinations. At the same time, winlines consisting of Wilds only do not pay.

In addition, there are several familiar functions on the slot control panel. For example, Turbo makes it possible to significantly speed up the rotation of the reels, while reducing the quality of the animation. The auto mode starts automatic spins, which will continue until you press the same button again.

There are 4 tabs in the game settings menu. On the first one, you can see the statistics of the played rounds, and on the second one, you can set up automatic spins. The remaining tabs are responsible for the choice of language, sound level and quality of game graphics.

4 of a King RTP and Volatility

6.3 
The RTP of the game is 96.03%-96.08% while the volatility is high.

RTP in slots is responsible for the theoretical percentage of return on bets invested by players. Accordingly, after a long gaming session, you can get up to 96.08%. However, we are dealing with gambling and the random number generator, which cannot be part of the exact statistics. Therefore, you should not rely too much on RTP.

If the volatility is high, the game will pay not that often. You may get bored or spend too much money before getting the best prize line.

Theme

7.1 

The slot looks a little old-fashioned, but this can be considered its distinguishing feature. The background of the game is covered with green cloth with patterns, which is reminiscent of vintage land-based casinos. The game grid is bounded by a retro frame, and the tall symbols look like the heroes of outdated commercials on it. In general, the provider managed to convey the atmosphere of the good old casinos.

The soundtrack to the game leaves a good impression. The music perfectly conveys the atmosphere of the slot, and the sounds of spinning reels and game events are different from those that we often hear in such titles.

The four low symbols of the game are flipped cards of different colours - blue, yellow, green and red. The high elements are the Dealer Woman, the Dealer Man and the Happy Couple, who seem to be celebrating a big win.

Theme
4 of a King Slot - Paytable

Mobile Compatibility

Mobile Compatibility
The slot is great for playing on portable devices. The playing field automatically adjusts to screens of any resolution by using the HTML5 technology.

About Endorphina

Endorphina is a provider that has been operating in the iGaming market for 10 years. During this time, the company has created and released more than 100 slot machines, many of which have become hits. The provider's best titles are Hell Hot 100, Twerk and Joker Stoker.

Bonus Rounds & Free Spins

5.5 

This game is almost devoid of bonuses or any notable features. However, the provider included a risk game in it.

Gamble

After each win, you can click on the red button on the left side of the slot and activate the risk round. As soon as a separate screen loads, 5 cards will appear on it. Four of them are upside down and one is shown to the player. You have to choose one of the four closed cards to beat the open one. If you succeed, your winnings will be doubled. If not, the risk game ends and you will return to the base round.

Thus, any prize in the game can be increased up to 10 times. If luck favours you, you can get a very large payout. However, it should be noted that in the risk game, the RTP is only 84% on average.
4 of a King Slot - Gamble Feature

4 of a King Demo Play

If you want to play 4 of a King for free, use the demo we have posted on this page. It is available without registration and deposit.

Max Win

5.3 
Max win in this slot is 1,000x.
Such an amount can be won for 5 identical Happy Couple symbols in a line, so soberly assess your strengths (and your budget) before deciding to conquer such a peak. Although the game has relatively frequent payouts, no one can guarantee you a big win.

Overall Rating

6.1
4 of a King is a great slot for those who are bored with modern titles overloaded with graphic effects and bonus features. It works exactly like the old slot machines worked in the first land-based casinos. The game will certainly appeal to a wide range of gamblers.
Hits
Retro theme
Gamble feature
Easy gameplay
Misses
Lack of bonus features

FAQ-section

Do I Need to Make a Deposit to Play 4 of a King?

No, if you play demo version of this slot. A deposit is required if you would like to play 4 of a King for real money.

What is the Return to Player (RTP) rate of 4 of a King?

The RTP of the title is 96.03%-96.08%.

Can I Earn Real Cash Prizes in 4 of a King?

Yes. It is possible when playing for real money in an online casino.

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Fabio Duarte
Fabio Duarte
Expert in: News, Blog, Slot reviews, Payments
Fabio is a young writer with +6 years of experience in gambling & betting. Fabio creates professional reviews of casino and slots. Every single article Fabio made exhibits deep analytical skill and comprehensive coverage of a topic. It’s Fabio – one of the leading authors on slotsjudge.com.

2162 articles

Reviewed by Editor-in-Chief
Nikita Lukanenoks

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