4 of a King Slot Review
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- the BitcoinCasinoID desk
- Last checked
- Method
- Four checks, no score
4 of a King virtual slot machine is a so-called traditional slot game developed by Endorphina – a game development provider based in Prague, Czech Republic.
19+. Some links on this page are affiliate links: the operator may pay us a commission if you open an account. It costs you nothing and does not change the order of any list. Terms move; the operator's own page is the final word. How we rate
- Software
- Endorphina
- RTP
- 96%
- Volatility
- Medium to high volatility
4 of a King Slot Review
This young team has entered the competition on the online gambling market in 2018 and so far delivers around 12 games per year.
Their products enjoy an increasing popularity among both online casinos and slot games’ enthusiasts all over the world, the game being one of the most popular among them. Overall, this provider is an interesting choice for experienced players looking for something new – casinos, using Endorphina Software platform could present some new approaches one will enjoy.
The slot game features 5 reels with 10 pay lines. A player will see a good old atmosphere of a real Las Vegas casino with its astonishing big band casino music, traditional interior design and all other accessories usually associated with a casino.
According to multiple slot review posts widely available on the net, the game is very simple to play, it requires absolutely no strategy to contemplate in order to hit the impressive jackpot.
With 6 symbols overall in the arsenal, the game could offer a max prize of up to 100 000 coins – currency used for in-game processes. The size of a coin oscillates between 0.01 and 10 US dollars each. With a return to player index (hereinafter, RTP) of up to 96%, this game represents an attractive destination for many players. As soon as the player gets a win, he/she would have to choose to either take the money or continue playing. The dealer would deal 5 cards on the table and will turn one card up face leaving the player to choose one card from the remaining 4.
In the event the player’s card is higher than the dealer’s one, the winning amount is doubled. In case the player wins, decides to play one more game and loses, the entire amount is discarded. Overall, the game enjoys very positive feedback as it offers a really exciting gameplay scenario and reward potential.
The video slot is fully cross-platform compatible, and can be equally enjoyed from any in-house available device (desktop or mobile) running on any platform. Be it Windows, Linux, MacOS, Android or iOS, the player will be able to savor a highly qualitative gaming experience during both in-doors and out-doors sessions. As already mentioned above, the game showcases highest quality 3D graphics and animations, as well as OSTs and sound effects. Given the intuitive interface of the slot and the fact that it is fairly rich in bonus features, a player who looks for big rewards would definitely enjoy it this being the reason so many online casino sites are readily packing it up in their arsenal of games.
Where this game runs
Logbook checkedCasinos in our logbook that list this studio.
- Top of the logbook01BETBetum.com300% up to C$4,500 + 300 free spins
- LicenceAnjouan
- Since2024
- Coins5
- CashierBTCDOGEETHLTC+1
Open Betum.com19+ · New players only · T&Cs applyTerms as published
Welcome offer
- Offer
- 300% up to C$4,500 + 300 free spins
- Free spins
- 300
Coins in the cashier
BTC, DOGE, ETH, LTC, USDT
The operator
- Online since
- 2024
- Licence
- Anjouan
- Sportsbook
- Yes
- Live tables
- Yes
- Operated by
- Pulsiora Ltd (reg. 000053623, Orange Walk Town, Belice)
- Runner-up02
SlotLounge100% up to C$22,500 + 350 free spinsWagering 40x- LicenceCuracao OGL/2023/176/0095 (H
- Interace-Transfer
- Since2025
- Coins3
- CashierBTCETHUSDT
Open SlotLounge19+ · New players only · T&Cs applyTerms as published
Welcome offer
- Offer
- 100% up to C$22,500 + 350 free spins
- Wagering
- 40x
- Min. deposit
- C$30
- Free spins
- 350
Coins in the cashier
BTC, ETH, USDT
The operator
- Online since
- 2025
- Licence
- Curacao OGL/2023/176/0095 (H
- Live tables
- Yes
- Operated by
- Hollycorn N.V. (OCD); other sources: Stable Tech N.V.
- Longest on record03
JooWelcome package up to C$1,800 + 100 free spinsWagering 50x- LicenceCuracao Gaming Control Board
- Since2018
- Coins9
- Wagering50x
- CashierBCHBNBBTCDOGE+5
Open Joo19+ · New players only · T&Cs applyTerms as published
Welcome offer
- Offer
- Welcome package up to C$1,800 + 100 free spins
- Wagering
- 50x
- Min. deposit
- C$30
- Free spins
- 100
Coins in the cashier
BCH, BNB, BTC, DOGE, ETH, LTC, TRX, USDT, XRP
The operator
- Online since
- 2018
- Licence
- Curacao Gaming Control Board
- Live tables
- Yes
- Operated by
- Stable Tech N.V. (per AskGamblers now; historically Dama N.V.)
- 04
Zotabet100% up to C$10,000 + 100 free spinsWagering 40x- LicenceTobique Gaming Commission
- Interace-Transfer
- Since2022
- Coins10
- CashierADABCHBNBBTC+6
Open Zotabet19+ · New players only · T&Cs applyTerms as published
Welcome offer
- Offer
- 100% up to C$10,000 + 100 free spins
- Wagering
- 40x
- Min. deposit
- C$30
- Free spins
- 100
Coins in the cashier
ADA, BCH, BNB, BTC, DOGE, ETH, LTC, TRX, USDT, XRP
The operator
- Online since
- 2022
- Licence
- Tobique Gaming Commission
- Sportsbook
- Yes
- Live tables
- Yes
- 05
Casinoly300% up to C$4,500 + 300 free spinsWagering 35x (40x on free spins)- Interace-Transfer
- Since2021
- Coins5
- Wagering35x (40x on free spins)
- CashierBCHBTCETHLTC+1
Open Casinoly19+ · New players only · T&Cs applyTerms as published
Welcome offer
- Offer
- 300% up to C$4,500 + 300 free spins
- Wagering
- 35x (40x on free spins)
- Min. deposit
- C$30
- Free spins
- 300
Coins in the cashier
BCH, BTC, ETH, LTC, USDT
The operator
- Online since
- 2021
- Sportsbook
- Yes
- Live tables
- Yes
- 06
SlotsMafia100% up to C$22,500 + 350 free spinsWagering 50x- LicenceCuracao OGL/2023/176/0095
- Interace-Transfer
- Since2024
- Coins8
- CashierADABNBBTCDOGE+4
Open SlotsMafia19+ · New players only · T&Cs applyTerms as published
Welcome offer
- Offer
- 100% up to C$22,500 + 350 free spins
- Wagering
- 50x
- Min. deposit
- C$45
- Free spins
- 350
Coins in the cashier
ADA, BNB, BTC, DOGE, ETH, LTC, TRX, USDT
The operator
- Online since
- 2024
- Licence
- Curacao OGL/2023/176/0095
- Live tables
- Yes
- Operated by
- Hollycorn N.V.
- 07
Bizzo125% up to C$7,250 + 175 free spinsWagering 40x- LicenceCurazao
- Interace-Transfer
- Since2021
- Coins3
- CashierBTCETHLTC
Open Bizzo19+ · New players only · T&Cs applyTerms as published
Welcome offer
- Offer
- 125% up to C$7,250 + 175 free spins
- Wagering
- 40x
- Min. deposit
- C$25
- Free spins
- 175
Coins in the cashier
BTC, ETH, LTC
The operator
- Online since
- 2021
- Licence
- Curazao
- Sportsbook
- Yes
- Live tables
- Yes
- Operated by
- TechSolutions Group N.V.
- 08
PowBet300% up to C$4,500 + 300 free spinsWagering 35x (40x on free spins)- Interace-Transfer
- Since2021
- Coins5
- Wagering35x (40x on free spins)
- CashierBTCETHLTCUSDT+1
Open PowBet19+ · New players only · T&Cs applyTerms as published
Welcome offer
- Offer
- 300% up to C$4,500 + 300 free spins
- Wagering
- 35x (40x on free spins)
- Min. deposit
- C$30
- Free spins
- 300
Coins in the cashier
BTC, ETH, LTC, USDT, XRP
The operator
- Online since
- 2021
- Sportsbook
- Yes
- Live tables
- Yes
- 09
22betOur review100% up to C$2,210 + 150 free spinsWagering 50x- LicenceCurazao
- Interace-Transfer
- Since2017
- Coins12
- CashierADABCHBTCDASH+8
Terms as published
Welcome offer
- Offer
- 100% up to C$2,210 + 150 free spins
- Wagering
- 50x
- Min. deposit
- C$15
- Free spins
- 150
Coins in the cashier
ADA, BCH, BTC, DASH, DOGE, ETH, LTC, SOL, USDC, USDT, XMR, XRP
The operator
- Online since
- 2017
- Licence
- Curazao
- Sportsbook
- Yes
- Live tables
- Yes
- Operated by
- TechSolutions Group N.V. / Marikit Holdings Ltd
- 10
7BitCasinoOur review325% up to C$10,800 + 250 free spinsWagering 35x- LicenceCuraçao
- Interace-Transfer
- Since2014
- Coins9
- CashierADABCHBTCDOGE+5
Terms as published
Welcome offer
- Offer
- 325% up to C$10,800 + 250 free spins
- Wagering
- 35x
- Min. deposit
- C$40
- Free spins
- 250
Coins in the cashier
ADA, BCH, BTC, DOGE, ETH, LTC, TRX, USDT, XRP
The operator
- Online since
- 2014
- Licence
- Curaçao
- Live tables
- Yes
- Operated by
- Scores55 Tech B.V. (reg. 162990, Scharlooweg 39, Willemstad, Curazao)
- 11
Playamo100% up to C$1,500 + 150 free spinsWagering 50x- LicenceTobique Gaming Commission E-
- Interace-Transfer
- Since2016
- Coins6
- CashierBCHBTCDOGEETH+2
Open Playamo19+ · New players only · T&Cs applyTerms as published
Welcome offer
- Offer
- 100% up to C$1,500 + 150 free spins
- Wagering
- 50x
- Min. deposit
- C$25
- Free spins
- 150
Coins in the cashier
BCH, BTC, DOGE, ETH, LTC, USDT
The operator
- Online since
- 2016
- Licence
- Tobique Gaming Commission E-
- Sportsbook
- Yes
- Live tables
- Yes
- Operated by
- Novatrix SRL (Costa Rica, reg. 3-102-893958); historically Dama N.V.
- 12RUBRuby Fortune100% up to C$750 + 10 free spinsWagering 35xOutside Ontario
- LicenceAGCO / iGaming Ontario
- Interace-Transfer
- Coins5
- Wagering35x
- CashierBTCETHLTCUSDC+1
Open Ruby Fortune19+ · New players only · T&Cs applyTerms as published
Welcome offer
- Offer
- 100% up to C$750 + 10 free spins
- Wagering
- 35x
- Min. deposit
- C$10
- Free spins
- 10
- Where it applies
- Ontario rules bar operators from advertising welcome offers, so this package is the one published for the rest of Canada.
Coins in the cashier
BTC, ETH, LTC, USDC, USDT
The operator
- Licence
- AGCO / iGaming Ontario
- Live tables
- Yes
- Operated by
- Cadtree Limited
Every figure above is copied from the operator's own terms on the date shown and checked against the licence register. Nothing on this list can be bought: a brand that drops its licence leaves the list the same week. The four checks · Report a wrong figure
On this page5
4 of a King Slot Machine - Free Demo Play or For Real Money
| Paylines | 10 |
|---|---|
| Reels | 5 |
| Scatters | Yes |
| Wilds Symbol | Yes |
| Progressive Jackpot | Yes |
| Random Jackpot | Yes |
| Min bet | C$0.01 |
| Max bet | C$5 |
| Mobile | Yes |
| 3D Graphics | Yes |
Symbols and Winning Combinations
4 of a King is a video slot that uses the lowest possible number of symbols, these being as follows:
- Croupier and dealer – represented by a man and a woman;
- Pair of gamblers – the highest paid symbol, a winning combo of 5 of these hitting the reels would bring the player a reward of 1 000 times of the bet on stake;
- Blue card;
- Green card;
- Yellow card;
- Red card;
Cards are laying with their faces down and are the lowest-paid values. The game uses Wilds, the card represented by the game logo. In order to see an exhaustive pay table, players may click on the Menu and choose their respective option.
The game offers two interesting distinct options features:
- Lady Mini Game – is a bonus game will appear on the screen in any place as soon as the player finds and triggers it – this is desired option that can offer a very high multiplier; the aim of this mini-game is finding the Queen of Hearts, yet in case a King is drawn out the player loses all the money gathered so far;
- Progressive Mega Jackpot – given the circular nature of the gameplay, this feature is triggered whenever 5 Jackpot symbols hit the reels this offering a win of up to 100 000 coins (in case of a 100 US dollars bet);
A compliment for developers who envisaged potential server or connection errors – in case such errors occur, the results would still be determined and automatically transferred onto the account of the player. So, don’t panic in case something like this happens, just check your account balance.
4 of a King Slot Game – Free Spins & Bonuses
Effectively, players enjoy re-spins/free spins whenever a win is hit. The scenario of the game allows players whose spins triggered matching symbols falling on adjacent reels to choose – either take the win, leave and start the game from scratch, or continue playing with the total amount collected so far on the bet.
A slightly surprising thing is the absence of Joker in this card-themed slot game, this usually taking the role of the Wild. In this game, the Wild can substitute any symbol, including the free spins symbol and the Lady Mini Game symbol. The only exception where the Wild can’t help is the progressive Mega Jackpot symbol. Overall, it is correct to label the 4 of a King slot as being rich in free spins and bonuses. Players report that the features are shooting fairly often ensuring a continuously entertaining gaming process.
How to Play
Prior to proceeding with real money bets, it is advisable to check the rules of the game, the list of symbols, etc. Despite being a simple slot that hardly leaves questions about how to play it, it is always better to double check. Gladly, doing this is very easy, as well as testing the game in free play mode. Multiple online gambling establishments fighting for the title of the best online casino in their region and niche are contracting Endorphina and hence feature this slot game on board, some of them even include this game in their welcome offers. On top of that, Endorphina official website offers the opportunity to try this game in demo mode, with no deposit and even registration required.
As soon as the specifics of the game are clear, players may proceed with game settings. Unlike most slots, this one is ideal for people who enjoy fine-tuning the game conditions as 4 of a King offers a very detailed interface and controls. The list of controls include:
- Coin: allows setting the desired coin value, in the range between 0.1 and 10 US dollars per coin;
- Up/Down: allows choosing the desired bet value;
- Pay lines – offers the opportunity to choose the number of pay lines in play;
- Spin: triggers the game;
- Auto: option allowing pre-determining the number of spins to be triggered automatically;
- Take Risk: accept the proposal of proceeding with a re-spin with the previous win on bet;
- Take Win: allows withdrawing from the game with the current win transferred on the account;
Such a high number of controls ensures the player remains in control of the situation; at the same time, there is absolutely no need to keep any information in mind and count Wilds, Scatters or Spins.
Conclusion
To sum up, 4 of a King is the kind of slot game that players call classic, this having several reasons. Firstly, the game is very simple to master, even a novice player with limited or no experience with slot games would quickly understand the rules. Secondly, the game allows players to immigrate to a real-life traditional Vegas-style casino with respective attributes and a vintage atmosphere. Today an increasing number of slot sites adds this game to their portfolio, this being a good indicator of the game’s popularity. Overall, the list of pros and cons of this game would show following arguments:
PROS:
- Simple, intuitive, energetic and highly entertaining gameplay scenario, easy to learn and attempt to hit the Mega Jackpot with all chances to do it;
- Excellent 3D animations, vivid color and atmosphere supported by highly qualitative audio support;
- High chances to hit an impressive win – with an RTP of up to 96% depending on the casino, volatility labeled as medium to high and multiple opportunities to get a bonus (Lady Min Game, progressive Mega Jackpot feature, etc.) attract players from different categories of interests and budget;
- Very flexible setting allowing to customize the gaming process completely;
- Full cross platform compatibility;
CONS:
- Lack of free spins.
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