Latest Casino Bonuses for September 2025

AmunRa

Step Into Egypt’s Riches with Custom Welcome Bonuses, Free Spins, and Sports Offers

Welcome offer:

100% Bonus up to

€500

+ 200 Free Spins

Bonus on first deposit

Terms & Conditions apply ·  Play responsibly

AmunRa

Step Into Egypt’s Riches with Custom Welcome Bonuses, Free Spins, and Sports Offers

September 11

  • 100% Bonus up to €500 + 200 Free Spins with your first deposit (New customers)
  • Slovenian players are accepted
  • Accepts Bitcoin and other cryptocurrencies
  • Play instantly in your browser – No installation required
  • Mobile-friendly games · Enjoy playing on smartphones and tablets
  • Live Casino · Play against real croupiers at AmunRa
  • Online sports betting
  • Available in multiple languages, including English
  • Rating: 4/5
  • 89 Game Providers: Yggdrasil Gaming, Gamebeat, Spinomenal, Booongo, Aviator, Game Time Tec, Penguin King, 7777 Gaming, Booming Games, OnAir Entertainment, ICONIC21, Popiplay, and others.

iLucki

Special Lucky Welcome Bonus + 20 Free Spins for Mobile Verification!

Sign-up Bonus:

20

Free Spins

No deposit required

Terms & Conditions apply ·  Play responsibly

iLucki

Special Lucky Welcome Bonus + 20 Free Spins for Mobile Verification!

August 30

  • 20 Free Spins · No deposit required
  • 100% Bonus up to €100 + 100 Free Spins with your first deposit (New customers)
  • Bonus available on your second purchase
  • iLucki offers exclusive bonuses for CasinoBonusCenter visitors
  • Slovenian players are accepted
  • Accepts Bitcoin and other cryptocurrencies
  • Play instantly in your browser – No installation required
  • Mobile-friendly games · Enjoy playing on smartphones and tablets
  • Live Casino · Play against real croupiers at iLucki
  • Available in multiple languages, including English
  • Tested and certified by Casino Bonus Center · Rating: 3.9/5
  • 92 Game Providers: Boomerang Studios, Games Global, Four Leaf Gaming, Thunderkick, Blue Guru Games, Yggdrasil Gaming, Booongo, Iron Dog Studio, Mascot Gaming, Hacksaw Gaming, Endorphina, Skillzzgaming, and others.

Cleopatra Casino

Discover Cleopatra’s Secret Treasure: €8,000 for New Players

Welcome offer:

100% Bonus up to

€4,000

Bonus on first deposit

Terms & Conditions apply ·  Play responsibly

Cleopatra Casino

Discover Cleopatra’s Secret Treasure: €8,000 for New Players

August 29

  • 100% Bonus up to €4,000 with your first deposit (New customers)
  • Bonus available on your second and third deposit
  • Slovenian players are accepted
  • Accepts Bitcoin and other cryptocurrencies
  • Play instantly in your browser – No installation required
  • Mobile-friendly games · Enjoy playing on smartphones and tablets
  • Live Casino · Play against real croupiers at Cleopatra Casino
  • Over €14,404,337 in Jackpots by Games Global
  • Cleopatra Casino is available in 2 languages: German and English
  • Tested and certified by Casino Bonus Center · Rating: 4.1/5
  • 77 Game Providers: Playson, Prospect Gaming, Playtech, Evolution Gaming, BGaming, Amigo, Endorphina, Mr Slotty, Lucky Slots, Relax Gaming, G Games, Gamebeat, and others.

Ybets

Taste the Victory with Casino, Sportsbook, Live Betting, and Daily Chances to Win up to 5 BTC

Welcome offer:

200% Bonus up to

$2,000

+ 100 Free Spins

Bonus on first deposit

Terms & Conditions apply ·  Play responsibly

Ybets

Taste the Victory with Casino, Sportsbook, Live Betting, and Daily Chances to Win up to 5 BTC

August 23

  • 200% Bonus up to $2,000 + 100 Free Spins with your first deposit (New customers)
  • Bonus available on your second and third deposit
  • Slovenian players are accepted
  • Accepts Bitcoin and other cryptocurrencies
  • Play instantly in your browser – No installation required
  • Mobile-friendly games · Enjoy playing on smartphones and tablets
  • Live Casino · Play against real croupiers at Ybets
  • Online sports betting
  • Available in multiple languages, including English
  • Rating: 4.2/5
  • Popularity: This offer has been claimed by 37 visitors so far this month.
  • 81 Game Providers: Igrosoft, Hacksaw Gaming, Bang Bang Games, Tom Horn, Thunderkick, 3 Oaks Gaming, Jelly Entertainment, NolimitCity, Amatic, Casino Technology, Booming Games, AvatarUX, and others.

Immerion

Claim Up to $4,000 + 250 Free Spins - Join the Engine of Fortune for a Chance to Win up to 5 BTC

Welcome offer:

100% Bonus up to

$1,000

+ 100 Free Spins

Bonus on first deposit

Terms & Conditions apply ·  Play responsibly

Immerion

Claim Up to $4,000 + 250 Free Spins - Join the Engine of Fortune for a Chance to Win up to 5 BTC

August 22

  • 100% Bonus up to $1,000 + 100 Free Spins with your first deposit (New customers)
  • Bonus available on your second and third deposit
  • Slovenian players are accepted
  • Accepts Bitcoin and other cryptocurrencies
  • Play instantly in your browser – No installation required
  • Mobile-friendly games · Enjoy playing on smartphones and tablets
  • Live Casino · Play against real croupiers at Immerion
  • Online sports betting
  • Available in multiple languages, including English
  • Rating: 4.1/5
  • Popularity: This offer has been claimed by 45 visitors so far this month.
  • 94 Game Providers: Onlyplay, Turbo Games, Tom Horn, Bulletproof Games, Four Leaf Gaming, Reevo, NowNow, OctoPlay, VoltEnt, Big Time Gaming, Gamebeat, RAW iGaming, and others.

Villento Casino

Start Playing with Up to €1,000 in Free Bonuses

Welcome offer:

100% Bonus up to

€150

Bonus on first deposit

Terms & Conditions apply ·  Play responsibly

Villento Casino

Start Playing with Up to €1,000 in Free Bonuses

August 13

  • 100% Bonus up to €150 with your first deposit (New customers)
  • Bonus available on your second and third deposit
  • Slovenian players are accepted
  • Accepts Bitcoin and other cryptocurrencies
  • Play instantly in your browser – No installation required · Optional game downloads available
  • Mobile-friendly games · Enjoy playing on smartphones and tablets
  • Live Casino · Play against real croupiers at Villento Casino
  • Over €2,438,907 in Progressive Jackpots
  • Available in multiple languages, including English
  • Tested and certified by Casino Bonus Center · Rating: 4/5
  • Popularity: This offer has been claimed by 309 visitors so far this month.
  • 39 Game Providers: Blue Ring Studios, Coin Machine Gaming, Nailed It!, Circular Arrow, OnAir Entertainment, Infinity Dragon, Flip Five Gaming, Switch Studios, Area Vegas, Games Global, Neko Games, Just for the Win, and others.

Casino Extreme

Up to €5,000 Bonus with your first deposit · €150 Free Sign-Up Bonus!

Free Bonus:

€150

No deposit required

Terms & Conditions apply ·  Play responsibly

Explore bonuses at Casino Extreme

Casino Extreme

Up to €5,000 Bonus with your first deposit · €150 Free Sign-Up Bonus!

August 11

  • €150 free! No deposit required
  • Bonus Code: KINGS150
  • 1,000% Bonus up to €5,000 with your first deposit (New customers)
  • Bonus available on your second and third deposit
  • Slovenian players are accepted
  • Accepts Bitcoin and other cryptocurrencies
  • Play instantly in your browser – No installation required
  • Mobile-friendly games · Enjoy playing on smartphones and tablets
  • Casino Extreme is available in English
  • Tested and certified by Casino Bonus Center · Rating: 3.1/5
  • Games Provider: SpinLogic

Top 10 Online Casino Bonuses in Slovenia (September 2025)

Expert-Rated Real Money Casinos with Top Bonuses

Looking for the best online casinos in Slovenia? Our expert team has tested and reviewed hundreds of real money gambling sites to bring you the top 10 choices for September 2025. Casino Classic, Casino Kingdom, and SnatchCasino lead our rankings, standing out for their extensive selection of high-paying slots, immersive live dealer tables, exclusive bonuses, and lightning-fast payouts.

Most Popular Online Casinos in Slovenia

Curious which brands stand out among Slovenian players right now? Here are the top 3 most popular online casinos in the last 30 days—each trusted for their excellent bonuses, diverse games, and reliable payouts:

  1. KingSpin Casino – Ranked as the #1 most popular online casino among Slovenian players this month. Check why KingSpin Casino is so popular in Slovenia
  2. Casino Classic – Holds the second spot in popularity with Slovenian players for September 2025. See Current Bonuses at Casino Classic
  3. Rich Palms – Currently ranked #3 among Slovenia’s most played online casinos. View Available Promotions at Rich Palms

Browse our expert-ranked list below and claim your exclusive welcome bonuses today!

Online Casinos SloveniaWelcome Bonus

Get 40 Spins for Just €1

40 Free Spins

40 chances to become a millionaire for €1

40 Free Spins

Casino Fun, Beach Vibes, Gangster Style

Bonus of 225% up to €1,000 + 100 Free Spins

Up to €6,000 Bonus · Unlimited VIP Betting!

Bonus of 100% up to €6,000 + 100 Free Spins

Big bonuses, Live casino, and Sports

Bonus of 100% up to €500 + 200 Free Spins

Join the Boss’s Inner Circle for Big Wins!

Bonus of 200% up to €300 + 50 Free Spins

Unleash 200 Free Spins Today!

Bonus of 100% up to €300 + 100 Free Spins

€200 bonus + 10 free spins on Vegas

Bonus of 100% up to €200 + 10 Free Spins

Claim up to €500 in Bonuses

Bonus of 100% up to €100 + 180 Free Spins

Get 150 chances to become a millionaire

150 Free Spins

* Terms & Conditions Apply ·  Play responsibly

With nearly two decades of experience in the industry, CasinoBonusCenter.com has been analyzing and comparing online casinos since 2006. Our dedicated team of professionals has handpicked the most trusted casinos for Slovenian players to ensure you get the biggest sign-up bonuses, top-tier games, and the most rewarding loyalty programs.