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I remember thinking that Dunder was a bit of an odd name for an online casino when I first got wind of the site back in early 2016. I was never fully sure why, but I think it’s because I automatically associated it with ‘Dunderhead’, a weak, slightly pathetic playground insult I remember from my youth. This all exposes me for what I am. A cretinous native English speaker with no grasp of other European languages! Dunder actually means ‘thunder’ in Swedish, which is a pretty funky name for a gaming site. It’s release was accompanied by a storm of publicity, perhaps befitting of an online casino that has some strong roots. It’s the bedfellow of longstanding favourite Guts and Casumo, so there’s plenty of expertise behind the brand. Little wonder that Dunder was one of the most eagerly anticipated new casinos of recent years. But has it lived up to the hype?


The Dunder team clearly set out with a mission. They’ve designed to their site to be minimalistic and entirely devoid of unnecessary clutter. They’ve achieved their goal with remarkable success too. In doing so, they’ve proven that gaming sites don’t need swathes of menu options or marketing images to function well. We’ll address this ‘minimalism’ in greater detail in the next section because it directly informs the usability of the website. However, it also contributes hugely to the look of the site. You might think that their approach would leave a reviewer with little to write about, but that’s not the case at all. The stark design of Dunder is exactly what sets it apart from its peers. There’s isn’t another casino quite as simple as this one.

The designers and developers chose a predominantly white colour scheme, perhaps unsurprisingly. White online casinos always look tidy and provide a nice contrast against the bright colours of the game thumbnails. It certainly looks good here. The only other addition to the Dunder game page is a banner across the top, and a link to a ‘burger menu’, which opens out on the side. That links to a few core pages, each of which follows the same approach as the rest of the site. It all favours big fonts, minimal but well structured (and clearly written) content and no unnecessary clutter. Only the homepage shows any deviation from the approach. Even then, it just includes some attractive images of blue seas and beaches to catch the eye. Scroll down and you’re met with the same large, simply signposted links as you find elsewhere. It all looks crisp, neat and unfussy. We’re confident that most online casinos will appreciate it.


As of April 2020, Dunder has stopped offering either free spins or bonus spins to members when they register. The casino  launched by offering new players 20 no deposit bonus spins (note they were ‘bonus spins’ rather than ‘free spins’ because they are subject to x25 wagering requirements). They kept this offer in place for four years, which was refreshing. A lot of new online casinos use no deposit bonus ‘free’ spins to attract attention when they first launch, only to abandon them as they become more established. It was perhaps surprising then that the Dunder retained the offer of 20 no deposit spins on trusty Netent classic Starburst and 100 free spins upon a player’s first deposit for four years. 

The Dunder Casino free spins now need to be called Dunder Casino bonus spins because they attract a 25x wagering requirement. Dunder began life by offering new players 20 no deposit bonus spins, and they’ve kept that offer in place. This is refreshing. A lot of new online casinos use no deposit free spins to attract attention when they first launch but abandon them as they become more established. You can use your 20 no deposit bonus spins on trusty Starburst (ok, so we prefer to see a different game once in a while), and they are automatically credited to your account. As soon as you’ve successfully registered and verified your Dunder account, just open up Starburst and start playing.


We appreciate that the loss of a guaranteed 120 bonus spins will be off-putting to many, and I’m sure Dunder do too. However, it’s not like you don’t receive anything when you register. They still offer new players a 100% cash bonus up to £100 when they first register. It’s just that they don’t offer the 100 bonus spins alongside it anymore. You need to deposit a minimum of £20 (which is actually quite high) to claim your bonus. As it’s a 100% cash match offer, you’ll receive the value of your deposit back as bonus cash. The wagering requirements are steep though – x80. That means you will need to play through the value of your bonus 80 times over before you can withdraw any associated winnings. Please be aware that Dunder Casino no longer offers reload bonuses on your 2nd and 3rd deposits either – they previously gave players a 50% bonus up to £150 on your deposit and a 25% bonus up to £400 on the 3rd deposit, but these promotions no longer apply. If you see them in advertised anywhere in 2020, you’re looking at outdated information! We’ve summarised the terms of the current 100% first deposit bonus below.

The main bonus terms are: 18+. Minimum deposit: £20. 100% bonus up to £100 valid on first deposit only. Wagering on bonus: 80x. Wagering must be completed within 30 days. Max bonus bet £5. Bonus is valid for a total of 21 days. Game weighting, payment method and standard bonus terms apply.


The minimalist approach ensures that Dunder Casino is ridiculously easy to use. There’s no immediate top menu as we indicated earlier, so it differs from most other sites in that regard. It uses a ‘burger’ menu instead. Most of us are familiar with these from using smartphone, they are little option sets which pop out when you click on the icon with three evenly sized horizontal lines (the three lines look like two baps with a filling inside, hence the name). When you first open out the menu, you may be a bit puzzled. There are only four or five options there, and it doesn’t include ‘Games’ (they’re linked from the top of each page). Surely there must be missing functionality right? Wrong, actually. We found everything we needed. They’ve just exposed how cluttered other casinos can be.

Ultimately, the side menu leads you to the deposit, withdrawal and ‘My Account’ sections. The latter allows you to control your personal details, current password, and choose whether or not you want to receive marketing material from the site. You can access the games by clicking the link at the top of the page (you choose between ‘home’, ‘games’ or the burger menu, but again, what else do you need?) Help is at hand through a dedicated portal that leads to some easily read FAQs and the Dunder live chat function, which is available for 12 hours per day. We would perhaps have preferred some filtering options on the games page, which is again very simple as it stands. You do have categories, each arranged in their own thumbnails so Dunder can again eschew the need for top menus and clutter. It’s all very visual and largely easy to understand. Registration is a piece of cake as well, you’ll be signed up and verified within a couple of minutes. You can then get your teeth into your 20 no deposit bonus spins straight away.


So, the Dunder slots page does work well, but you only have game ‘sub categories’ to guide you. There are no filters to allow you to select slots from different providers. We can help you out a bit here though, and we’ll start by telling you that Dunder is another site with a huge NetEnt presence. In this regard, it follows the lead of lots of other Scandinavian online casinos, and it’s certainly no bad thing. However, the story doesn’t end here. They also stock slots from a host of other suppliers of all shapes and sizes. There’s a hefty MicroGaming selection, and Thunderkick, IGT, BetSoft, Play N’ Go, Quickspin, Elk Studios and Red Tiger are also heavily represented. It all adds up to one of the biggest catalogues you’ll find anywhere. That’s all the more impressive given that Dunder is still a relatively new online casino.


Dunder Casino games catalogue is impressive to say the very least. Over 1000 casino games to choose from. including the latest slots, blackjack, roulette, baccarat and live casino games.

They’ve also arranged the games into interesting categories. As you would expect, you have categories reflecting the type of game (Roulette, blackjack, slots etc). You can also access the Evolution Gaming powered, Live Casino and jackpot slots. There’s plenty of potential money spinners in the 2nd bracket – a whopping 28 games in total in fact – including jackpot slots like Mega Moolah and Mega Fortune. Beyond these categories, however, they take a different approach. They’ve broken the Dunder casino games down by all sorts of factors relating to shared features and themed. There’s a ‘fairytale’ section housing slots like Big Bad Wolf and Little Red Riding Hood for example. Then there’s a ‘Falling Symbols’ category, in which games like Gonzo’s Quest, Thunderstruck II and Energoonz. It’s a cool little system they have running. There’s categories for Stacked Wilds, Wild Reels, Crime, Mythology…all sorts really. Perhaps bizarrely, they have chosen not to use software providers as a category. Inside the categories, all Dunder casino games are arranged in alphabetical order to make your life easier. There’s a direct search function too if you want to skip straight to a game.


The usability described earlier in this review helps Dunder retain its players. Most of us are quite happy with a simple design. We don’t need to be patronised by flashy graphics and cluttered sites, we’re quite happy to play with the minimum of fuss. In that regard, the whole ethos of the site is as attractive. It’s also reflected by transparent communication and excellent customer service. It’s little wonder that Dunder has moved out the considerable shadow of its stablemates, Casumo and Guts. It would never claim to be the biggest for promotions. However, don’t be fooled by the lack of a promotions page. Dunder favours a more personal approach, so you’ll receive tailored rewards if you become a regular player. They won’t neglect you, they just don’t shout from the rooftops. It’s not the Dunder way.


Dunder is licensed with the UK Gambling Commission (039575-R-319439-002 issued on 13 August 2015) and the Malta Gaming Authority. The Malta Gaming Authority licenses  MGA/CL1/954/2014 and MGA/CL1/955/2014 were issued on 19 May 2014.  Having both licenses means Dunder have a considerable audit and oversite function imposed on them which adds a great deal of credbility.


Depositing at Dunder couldn’t be easier with a long list of casino payment methods. The processing time on debit cards Visa & MasterCard, Trustly, Skrill, Neteller, Euteller, EcoPayz and Paysafe is instant and free of any fee. The minimum deposit is £20 and a maximum deposit of £20,000 when using Skrill or Neteller. Similarly, withdrawals are instant with the exception of trustly and visa where it may take up to 3 days to process. Again, there are no fees for withdrawing. If you have any issues contact the customer support using live chat or email.


Dunder has borrowed a little bit of mobile functionality for their desktop site by employing the burger menu rather than the traditional static side and top menus. This also precipitates a more seamless transition into the Dunder mobile casino for iPad, iPhone and Android. The mobile devices site opens through the browser and wears a similar commitment to easy navigation and intuitive usability. We bet the Dunder design team are probably clean freaks in real life. You know, the sort who will whip a plate out of your hands as soon as you’ve finished your last mouthful of food. They just don’t like any mess or clutter, and their mobile site reflects this too.

That’s all impressive given how many games they have in stock. Few other new online casinos can boast such a massive collection for your smartphone or tablet. The fact that Dunder has established relationships with so many leading providers helps hugely in this regard. It all means that you can carry the vast majority of your favourite online slots around with you. There’s no need to download an app or do anything special. Load up your browser, log in and play. All the key functionality is included, so you can manage your cash balance and contact customer support from the mobile casino.


At the outset of this review, we asked whether Dunder Casino had lived up to the hype which greeted its launch. Well, I’m pleased to report that the answer is a resounding ‘yes’. It’s one of the most popular online casinos over the past 12 months, aided by the experience of the team that devised the concept, and its minimalist approach to site design. Both the mobile casino and desktop platform are wonderfully easy to use. It’s a crisp, comfortable environment with an easy interface and few flaws. The Dunder team are obviously confident that you’ll like it enough to stick around, and they’ve got every right to think that.

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