4 of a King

(Endorphina)
4 of a King Slot Logo – Free Play Demo by Endorphina
CGSCORE 64 Average

This is our own slot rating based on how popular the slot is, RTP (Return To Player) and Big Win potential.

Play the 4 of a King free demo slot—no download required! Try Endorphina’s latest game, enjoy risk-free gameplay, explore features, and learn game strategies while playing responsibly. Read our expert 4 of a King slot review with ratings for key insights before you play.

Released:August 1 2015

Key Features
  • Reels: 5
  • Paylines/Ways: 10
Game Mechanics:
Themes:

4 of a King Demo Slot

Responsible Gaming

You have to be 18 years or older to play our demo games. Please confirm that you are of the legal age to proceed:

Real Play
Not working?
Answer the security question to report slot:

The game not working? Try using a VPN.
PLAY 4 OF A KING WITH REAL MONEY HERE Where to play 4 of a King MORE ENDORPHINA CASINOS
CryptoGames.io Casino Rating 4.4/5 59+ Game Providers

Costa Rica-License

 Exclusive
50 Free Spins*
Bonus T&C Apply No bonus code required Min. deposit: $100 / 0.001 BTC Wager requirement: 5X More bonus info Full Bonus T&C
Get Bonus 18+ | T&C Apply | Play Responsibly | BeGambleAware.org *Bonus may vary depending on country. Wild.io Casino Rating 3.8/5 35+ Game Providers

Curacao-License

 Exclusive
200% up to $/€8000 + 300 Free Spins*
Bonus T&C Apply No bonus code required Min. deposit: 0.001 BTC Wager requirement: 40X More bonus info Full Bonus T&C
Get Bonus 18+ | T&C Apply | Play Responsibly | BeGambleAware.org *Bonus may vary depending on country. America777 Casino Rating 3.8/5 138+ Game Providers Exclusive
300% up to €1000 + 100 Free Spins*
bonusinfo There is a No Deposit Bonus available: 50 Free Spins
Bonus T&C Apply Bonus code: ZX88 Min. deposit: $/€10 Wager requirement: 35X More bonus info Full Bonus T&C
Get Bonus 18+ | T&C Apply | Play Responsibly | BeGambleAware.org *Bonus may vary depending on country. Mirax Casino Rating 3.4/5 84+ Game Providers

Curacao-License

 1st Deposit
100% up to $/€200 + 50 Free Spins*
Bonus T&C Apply No bonus code required Min. deposit: $/€20 Wager requirement: 30X More bonus info Full Bonus T&C
Get Bonus 18+ | T&C Apply | Play Responsibly | BeGambleAware.org *Bonus may vary depending on country. Eddy Vegas Casino Rating 3.3/5 35+ Game Providers

Curacao-License

 1st Deposit
100% up to $400*
bonusinfo There is a No Deposit Bonus available: 15 Free Spins
Bonus T&C Apply No bonus code required Min. deposit: $10 Wager requirement: 30X More bonus info Full Bonus T&C
Get Bonus 18+ | T&C Apply | Play Responsibly | BeGambleAware.org *Bonus may vary depending on country. FortuneJack Casino Rating 4.6/5 37+ Game Providers

Curacao-License

 1st Deposit
110% up to 1.5 BTC + 250 Free Spins*
bonusinfo There is a No Deposit Bonus available: 100 Free Spins (Wager-free)
Bonus T&C Apply No bonus code required Min. deposit: 0.005 BTC Wager requirement: 30X More bonus info Full Bonus T&C
Get Bonus 18+ | T&C Apply | Play Responsibly | BeGambleAware.org *Bonus may vary depending on country. LuckyDays Casino Rating 4.3/5 53+ Game Providers

Curacao-License

 1st Deposit
100% up to $/€100 + 100 Free Spins*
Bonus T&C Apply No bonus code required Min. deposit: $/€20 Wager requirement: 25X More bonus info Full Bonus T&C
Get Bonus 18+ | T&C Apply | Play Responsibly | BeGambleAware.org *Bonus may vary depending on country. Snatch Casino Rating 4.3/5 80+ Game Providers

Curacao-License

 1st Deposit
200% up to $/€1000 + 100 Free Spins*
Bonus T&C Apply No bonus code required Min. deposit: $/€15 Wager requirement: 40X More bonus info Full Bonus T&C
Get Bonus 18+ | T&C Apply | Play Responsibly | BeGambleAware.org *Bonus may vary depending on country. MyStake Casino Rating 4.3/5 94+ Game Providers

Curacao-License

 1st Deposit
150% up to $/€750*
bonusinfo There is a No Deposit Bonus available: 30 Free Spins
Bonus T&C Apply No bonus code required Min. deposit: $/€20 Wager requirement: 30X More bonus info Full Bonus T&C
Get Bonus 18+ | T&C Apply | Play Responsibly | BeGambleAware.org *Bonus may vary depending on country. Candy Casino Rating 4.1/5 128+ Game Providers

Curacao-License

 Exclusive
200% up to $/€200*
bonusinfo There is a No Deposit Bonus available: 100 Free Spins
Bonus T&C Apply Bonus code: GAMESONNET Min. deposit: $/€20 Wager requirement: 40X More bonus info Full Bonus T&C
Get Bonus 18+ | T&C Apply | Play Responsibly | BeGambleAware.org *Bonus may vary depending on country. Canada777 Casino Rating 4.1/5 138+ Game Providers

Curacao-License

 Exclusive
300% up to €1000 + 100 Free Spins*
bonusinfo There is a No Deposit Bonus available: 50 Free Spins
Bonus T&C Apply Bonus code: BONUS8 Min. deposit: $/€10 Wager requirement: 35X More bonus info Full Bonus T&C
Get Bonus 18+ | T&C Apply | Play Responsibly | BeGambleAware.org *Bonus may vary depending on country. Europa777 Casino Rating 3.9/5 138+ Game Providers

Curacao-License

 Exclusive
300% up to €1000 + 100 Free Spins*
bonusinfo There is a No Deposit Bonus available: 50 Free Spins
Bonus T&C Apply Bonus code: BONUS8 Min. deposit: $/€10 Wager requirement: 35X More bonus info Full Bonus T&C
Get Bonus 18+ | T&C Apply | Play Responsibly | BeGambleAware.org *Bonus may vary depending on country. Brasil777 Casino Rating 3/5 146+ Game Providers 1st Deposit
200% up to €1000 + 100 Free Spins*
bonusinfo There is a No Deposit Bonus available: 25 Free Spins
Bonus T&C Apply Bonus code: BONUS1 Min. deposit: $/€10 Wager requirement: 35X More bonus info Full Bonus T&C
Get Bonus 18+ | T&C Apply | Play Responsibly | BeGambleAware.org *Bonus may vary depending on country.

4 of a King Review

4 of a King Base Game Screenshot – Showing Features

4 of a King Reviewed by Casinogamesonnet.com

4 of a King is a video slot game created by the provider Endorphina. In this 4 of a King slot review you’ll learn about its core features (including RTP, max win, and volatility), the bonus mechanics, and what helps the game stand out — along with the areas where it may fall short.

Release Date

4 of a King was released on August 1 2015.

CGSCORE 64 Average

This is our own slot rating based on how popular the slot is, RTP (Return To Player) and Big Win potential.

Frequently Asked Questions About 4 of a King

Can I play 4 of a King without registering?

Yes! You can enjoy 4 of a King in demo mode without signing up. Try our free version above to explore the features. For real money play, visit one of our recommended Endorphina casinos.

How do I play 4 of a King for real money?

To play for real money:

  • Choose a trusted Endorphina casino from our list.
  • Create an account and make your first deposit.
  • Claim your welcome bonus (if available).
  • Search for “4 of a King” in the slots section.
  • Set your bet and start spinning.

Is there a Bonus Buy in 4 of a King?

No! There is no Bonus Buy feature available in 4 of a King. All bonus rounds must be triggered naturally during regular gameplay.

Is 4 of a King fair and safe to play?

Yes. 4 of a King is powered by Endorphina, a licensed provider that uses certified RNG (Random Number Generator) technology to ensure fair and unpredictable outcomes.

Are there welcome bonuses for 4 of a King?

Yes! Most of our featured Endorphina casinos on this page offer welcome packages that include free spins or bonus cash usable on 4 of a King. Always check the terms before claiming.

Is 4 of a King available on mobile?

Absolutely. The game is fully optimized for mobile devices, including iOS and Android.

Can I play 4 of a King on crypto casinos?

Yes, many crypto‑friendly casinos offer 4 of a King as long as they support games from Endorphina. You can usually play using popular cryptocurrencies like Bitcoin, Ethereum, or Litecoin. If you prefer crypto gaming, check out our list of trusted Bitcoin casinos to find platforms that accept digital currencies and feature Endorphina slots.

Is the free demo version the same as the real game?

Yes, the demo mirrors the full version in gameplay, features, and visuals—just without real money payouts.
TOP CASINOS
iWild Casino iWild
Slotsgem Casino Slotsgem
MyStake Casino MyStake
Fastpay Fastpay
Hell Spin Hell Spin
Winz.io Winz.io
More top casinos