Dunder 4.5 / 5


200% Bonus + 200 Free Spins
What to expect at Dunder:
  • 20 Free Spins without deposit
  • Bonus on first 4 deposits
  • Fast Cashouts and no hassle
Welcome bonus wagering:
  • Bonus wagering: 25 (B+D)
  • Frespins wagering: 25
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Dunder Online Casino Review

Dunder is the Swedish word for Thunder, and that is exactly what was heard throughout the Online Casino world when Dunder opened its doors in 2016. Since the start, the management at Dunder has focused on creating a simple, smooth and easy to use online casino for the common Slot player. Sounds like a place tailor-made for SlotMad, right? Yes, with over 1570 games it really is a place of flashing lights and entrancing sounds (actually 1578 at the time of review and still going up on a weekly basis). We set out to give Dunder a run for its money, here’s what we learned!

Why play at Dunder

20 no deposit free spins, that is the best reason why you should take the 2-5 minutes it takes to sign up at Dunder.  The signup process is quick and easy, and during our review, even with the SMS verification step, we got through it in, deposited and received our bonus in less than three minutes.

Dunder offers a safe and secure gaming environment with lightning fast payouts approved in a matter of minutes sometime. Dunder is licensed by Maltese Gaming Authority in Malta, by the UK Gaming Commission and by the Swedish Lotteriinspektionen. So when you play at Dunder, you can be sure that your money are safe and any winnings will be honoured and paid out without delay.

Welcome Bonus

Dunder Welcome bonus

Dunder has set out to create a great offer for new players to try out their Casino. They didn’t think one bonus was enough, but instead put together four bonuses for your four first deposits. So if you have a bad start, you get some extra dough to try again. Always be sure to stay within your budget of course. Remember that the bonus offers can be used over the first 30 days after signing up.

  • 1st Deposit: 100% up to €50 plus 200 free spins on Starburst. The free spins are given out daily for 10 days in a row.
  • 2nd Deposit: 50% up to €100
  • 3rd Deposit: 25% up to €150
  • 4th Deposit: 25% up to €300

Here are the key terms of the welcome bonus package at Dunder:

  • 25xBonus+Deposit Wagering requirement
  • 25x wagering requirement on Free spins winnings.
  • Free spins are activated by the player on the ‘My Dunder’ page.
  • 30 days to wager the bonus
  • Minimum deposit €20
  • Maximum bet of €5 with bonus money
  • Skrill and Neteller deposits are not eligible for the welcome bonus.
  • Bonus has to be wagered before any winnings can be withdrawn.
  • The sign up offer might differ for players from Sweden, Norway, Finland, United Kingdom, Netherlands, Canada, Germany, Austria and New Zealand. Make sure you check what your welcome offer.
  • Many banned games from playing with bonus money, be sure to read up on them.

Of course, make sure you read the terms and conditions completely to see if any of your favorite games might be banned. Banned games are generally the same across different online casinos. The reason for this is because of features or functionality in the games which allows players to abuse that feature using bonus money to circumvent the bonus system wagering in some way, shape or form. However, sometimes Casinos add new games or different games for their own reasons, so it never hurts to make sure you can play the games you want to play without risk.

Dunder’s Slots

Dunder Casino is on the iGaming Cloud Platform which means the enjoy access to a large range of game studios and payment methods. It is the same platform as some other Casinos we have reviewed, such as Wishmaker and GUTS. We set off to try some of the new slots around, and Ninja Ways from Red Tiger Gaming caught our eyes. Six reels and four symbols on each means a sweet 4096 different ways to win. It doesn’t hurt that the main character looks like Super Saiyan either if you are hoping for some smashing wins.

Ninja Ways Red tiger GamingSuper Saiyan


We continued jumping around on different Games and Game Studios. Most games loaded quickly and we had no issues with losing connection to the game servers or anything. Some games loaded a bit slower than other, specially older Microgaming and other games still using Flash.  With over 1570 games to choose from, you are bound to find something you will love. All in all, we had a good, fun slotting time at Dunder.

Explore the 1500+ games at Dunder

Live Casino

Surprisingly, it seems like Dunder really doesn’t want their players finding the Live Casino for some reason. Evolution Gaming and Netent Live are available, but quite hidden. Opening up the Category ‘Live Casino’ shows six different games, just the classics. To reach the rest of the games available, you will have to open up one of the games you don’t want to play and then navigate your way in the Evolution Gaming Lobby (see below). They are even marketing Three Card Poker in the banner, without a thumbnail below.

As Dunders focus seems to be 100% on Slots, we were surprised they didn’t put the more volatile Live Dealer games front and center. For example, Dream Catcher, where you can win up to 6860 times your bet!

Live Casino at DunderLive Casino lobby

Promotions and other Features at Dunder

Dunder focuses mainly on providing a great playing experience for players instead of bribing them with bonuses and free spins. If you are a repeat customer, you will get regular offers when logging in. However, there is no ‘Promotions’ area on their site, so if you are the player who wants regular competitions, tournaments and other gamification features, you should try out one of these casinos instead:


Dunder scored a strong 4.5 of 5 stars with us. Fast cashouts, four bonuses on your first four deposits and no deposit free spins when signing up were the things which won us over. When they get working on tournaments and other promotions, they can get the 4.5 to a solid 5. But for now:

Dunder, Lightning, not at all frightening!

Sign up to Dunder today!

200 Free Spins
200% Bonus
  • 20 Free Spins without deposit
  • Bonus on first 4 deposits
  • Fast Cashouts and no hassle