Irondog
About provider
Iron Dog Studio was founded in 2017 and is based in Hove, England. It operates as part of the 1X2 Network, a company with roots dating back to 2002 that is often credited as the inventor of virtual football betting. The 1X2 Network parent structure gives Iron Dog access to established licensing relationships and distribution infrastructure.
There are countless providers who have licensed the Megaways engine, applied a new theme, and shipped a game. However, Iron Dog Studio has actually made good use of it. The provider uses Megaways license from Big Time Gaming as a foundation and then builds mechanics on top of it that you won't find anywhere else. It can range from locking reels during free spins to a giant seventh reel that gives you a million ways of rewarding.
This deal led to the creation of Branded Megaways in 2020, a customizable slot experience that allows casino clients to tailor a game to fit their own brand. That B2B Branded Megaways product put Iron Dog on the map beyond just their player-facing titles.
The studio also picked up the EGT Best Game of the Year award in 2020, and later in 2023, expanded under the 1X2 Network umbrella to launch live casino games as well. For a studio that's been operating for less than a decade, that's a meaningful range of output.
Iron Dog Studio Overview - License, Products, and More
Here's the essential information before we get into the games -
Detail | Info |
Provider | Iron Dog Studio |
Established | 2017 |
Headquarters | Hove, England, UK |
Parent Company | 1X2 Network |
License | Malta Gaming Authority (MGA), UK Gambling Commission (UKGC), Ontario |
Certifications | Gaming Laboratories International (GLI) |
Types of Games | Video Slots, Table Games, Scratch Cards |
RTP Range | ~88% to 96.70% (variable RTP on newer titles) |
Technology | HTML5, mobile-first |
Awards | EGT Best Game of the Year 2020 |
Iron Dog Studio is licensed in Malta, the United Kingdom, and Ontario. Their games are further certified by Gaming Laboratories International, which ensures the random number generator used in the slots is truly random and fair.
Iron Dog Studio Products
Iron Dog operates primarily as a slots studio, with table games and scratch cards rounding out the catalog for operator needs rather than as a genuine focus area.
Megaways Slots
Megaways Slots are the studio's signature output and where the majority of their development effort goes. Once Iron Dog acquired the Megaways license, it used the mechanic in more than half of its releases. Some of its titles feature traditional layouts with over 117,649 win ways, while others have less conventional reel sets capable of over one million ways to win.
Online Sweepstakes Slots
Standard Video Slots cover titles that don't use the Megaways engine. Blood Queen, Solar Nova, and Barbarian Gold are examples of Iron Dog titles that stand on their own mechanical legs without relying on Megaways to carry them.
Branded Megaways
Branded Megaways is the B2B product that set the studio apart in the operator market. Branded Megaways is a customizable slot experience that allows casino clients to tailor a game to fit their own services. This means operators can take the Iron Dog Megaways framework and skin it with their own brand. It's a product no other studio was offering at the time of launch.
Tables Games and Scratch Cards
Table Games and Scratch Cards fill out the catalog for operators who want a single-provider integration that covers multiple game types. Iron Dog's 3D Blackjack is among the more notable table game releases, but these formats aren't where the studio's creative energy is concentrated.
Fun Fact: Iron Dog Studio's first ever game release was a slot called Paint in 2017, which drops players into a colorful art-themed world across 5 reels and 20 paylines.
Iron Dog Studio Special Features
Now that we are familiar with the provider’s products, let’s take a look at the special features in the games.
- Locking Reels
Megaways with Locking Reels is Iron Dog's most original contribution to the Megaways format. Standard Megaways games vary symbols per reel randomly on each spin. Iron Dog added the ability for reels to lock during free spins, holding the maximum number of symbols in place while the bonus round runs.
The reel lock feature during free spins, in combination with the unlimited progressive multiplier, is what makes Pirate Kingdom Megaways particularly worth checking out. In 1 Million Megaways BC, this concept goes further still with the Mammoth Reel.
- Mammoth Reel
The Mammoth Reel is Iron Dog's most technically ambitious feature. One of the highlights of 1 Million Megaways BC is the extra mammoth reel that appears in the center during the free spins round. With this reel in play, it's possible to get to one million Megaways. No other Megaways title on the market reaches that number.
- Lucky Last Spin
Lucky Last Spin is a Iron Dog original that shows up across several titles, most notably Dwarven Gems Megaways. The Lucky Last Spin feature grants you an additional free spin if the last spin of the bonus round is a winner.
Then you get to take part in an extra free spin, where you can once again activate Lucky Last Spin. It's a small mechanical detail with a big psychological effect: instead of dreading your last free spin, you're rooting for it.
- Unlimited Progressive Multipliers
Unlimited Progressive Multipliers in Free Spins appear in Dwarven Gems Megaways and are the standout math feature in the catalog. Starting at 1x and incrementing by +1 after every tumble win, this multiplier has no cap whatsoever.
Every cascade compounds the win value without restriction. In a very high volatility slot, that's genuinely innovative design. It allows wins to scale with actual gameplay rather than hitting arbitrary ceilings most slots impose.
- Dwarven Bombs and Power Gems
Dwarven Bombs and Power Gems are the two modifier symbols in Dwarven Gems Megaways that work together with the unlimited multiplier. The Dwarven Bomb can appear at any time in the horizontal tracker and acts as a sticky wild.
Once no more wins occur, it explodes itself and removes random symbols from each vertical reel, with new symbols tumbling into the empty spaces to continue the win sequence. Power Gems add extra wilds and bonus spins on top.
Best Iron Dog Studio Slots at SweepKing
These five titles represent the best range of what Iron Dog offers: the highest RTP in the catalog, the record-setting Megaways title, the most popular standalone slot, the studio's Megaways debut, and the space-themed cluster slot.
Game | RTP | Unique Features | Max Win |
Dwarven Gems Megaways | 96.70% | Unlimited progressive multiplier, Dwarven Bombs, Power Gems, Lucky Last Spin, Bonus Buy (5 tiers) | 20,000x |
1 Million Megaways BC | 96.20% | Mammoth Reel (1M+ ways to win), Locking Reels in Free Spins, Sticky Wilds, cascades, Bonus Buy | 45,000x |
Blood Queen | 96.06% | 5x3 grid, expanding wilds, sticky wilds, free spins, high-volatility non-Megaways format | 360,000x (credits) |
Pirate Kingdom Megaways | 96.20% | First Iron Dog Megaways title, Locking Reels, multiplier wilds, cascades, up to 117,649 ways | 40,000x |
Solar Nova | 96.00% to 96.13% | 9x9 cluster grid, Solar Wild, Rocket Wilds with building multipliers, 4 jackpots up to 2,000x, Bonus Buy | 10,000x |
1. Dwarven Gems Megaways
Dwarven Gems Megaways has the highest RTP in the Iron Dog catalog at 96.70%, and the one title that earns that number in practice. The game runs across 6 reels with up to 200,704 ways, very high volatility, and an unlimited progressive multiplier that increments by +1 after every tumble win.
Plus, the Dwarven Bombs and Power Gems modifiers feed extra wilds and additional free spins into the bonus round. And the Lucky Last Spin awards one extra free spin if you win on your final free game, which can repeat as long as wins keep coming.
Further, the Five Bonus Buy tiers give you options ranging from a standard random spin count all the way up to a Bonus Upgrader that boosts modifier frequency. So, if you're picking one Iron Dog title at SweepKing and want the best math behind you, start here. Play Dwarven Gems Megaways free at SweepKing today.
2. 1 Million Megaways BC
No other Megaways game reaches one million ways to win, and it's all because of the Mammoth Reel. During the free spins round, an extra reel appears in the center.
With it in play, it's possible to hit over one million Megaways. The reels lock as they fill with symbols, and when a high multiplier lines up with a near-maxed grid, it's the most dramatic moment in the game.
The 96.2% RTP pairs with high volatility and a maximum reward of 45,000x. The free spins are where the game truly opens up, with the Mammoth Reel and locking behavior doing the heavy lifting. The base game can be slow going, but once the bonus fires, the ceiling justifies the wait. Play the demo free at SweepKing to see the Mammoth Reel in action.
3. Blood Queen
The Blood Queen runs on a standard 5x3 grid with an RTP of 96.06%, and features expanding wilds, sticky wilds, and free spins with a top reward of 360,000 credits. The vampire queen theme is dark and atmospheric without being gimmicky, and the visuals hold up well across longer sessions.
The combination of expanding wilds in the base game and sticky wilds during free spins gives you two distinct routes to big wins without requiring the Megaways engine to carry the experience.
For players who find variable-reel layouts overwhelming, Blood Queen delivers Iron Dog's feature quality in a format that's immediately familiar.
4. Pirate Kingdom Megaways
The title that started the Iron Dog Megaways run, and it still holds up. The Pirate Kingdom Megaways has an RTP of 96.20%, high volatility, and up to 117,649 ways to win across 6 reels. There are two wild types, including a multiplier wild that stacks to 8x with three in view.
The locked reel feature during free spins, combined with the unlimited progressive multiplier, is what makes this title genuinely worth revisiting. As a debut Megaways release, Iron Dog got the fundamentals right and added one mechanic the format hadn't seen before.
5. Solar Nova
The odd one out in the Iron Dog catalog, and better for it. Solar Nova runs on a 9x9 cluster grid with cascading wins, a max payout of 10,000x, and booster mechanics including 3x3 Wilds and random wild teleportation. It plays nothing like a Megaways title, which is exactly the point.
The Solar Wild can randomly transform vertical and horizontal rows from its central position to the edge of the board into one matching symbol type, a mechanic that creates chain reactions across the oversized grid. The four in-game jackpots up to 2,000x add a fixed prize layer on top of the cluster action.
For players who want something that feels completely different from the rest of the Iron Dog lineup, this is the one to load up.
Did you know? You can try 1 Million Megaways BC and every other Iron Dog Studio slot completely free in demo mode on SweepKing before playing with Sweeps Coins.
Iron Dog Studio Pros and Cons
Pros
- Above-average RTPs across the core catalog: Overall, Iron Dog's casino slots tend to be above average when it comes to RTP. Dwarven Gems Megaways leads at 96.70%, with several others sitting around the 96.2% mark.
- Genuine mechanical innovation within Megaways: The Mammoth Reel in 1 Million Megaways BC, the unlimited progressive multiplier in Dwarven Gems, and the Lucky Last Spin feature are all ideas that didn't exist in the Megaways format before Iron Dog built them.
- Strong parent company infrastructure: The 1X2 Network parent company has roots dating back to 2002 and nearly two decades of iGaming experience. That backing means Iron Dog's distribution, licensing, and compliance infrastructure is more developed than you'd expect from a studio founded in 2017.
- Megaways Branded offering for operators: Branded Megaways is a customizable slot experience that allows casino operators to tailor a game to their own brand and services. For sweepstakes platforms, this means Iron Dog-powered games can show up under custom branding without players always knowing they're playing an Iron Dog engine underneath.
Cons
- Heavy Megaways reliance: Once Iron Dog acquired the Megaways license, it used the mechanic in more than half of its releases. That's a lot of eggs in one basket. If Megaways-style gameplay doesn't appeal to you, Iron Dog's catalog shrinks significantly in titles worth trying.
- Base games can be slow before bonuses: In 1 Million Megaways BC, the base game wasn't lighting too many fires before free spins triggered. The 2x to 8x base game multiplier sounds better on paper than it usually turns out to be, and the jerky, fragile nature of the reels might make your eyes water. Several Iron Dog titles are built to pay in the bonus round, which means long stretches of the base game can feel like waiting rather than playing.
- Smaller catalog than major studios: Iron Dog has fewer than 100 titles, compared to the hundreds or thousands offered by Evolution subsidiaries or Spinomenal. For sweepstakes players who want variety, Iron Dog works best as part of a broader game lobby rather than as a single-provider destination.
Final Thoughts
Iron Dog Studio is the Megaways provider for players who want more than just the standard engine with a fresh coat of paint. Dwarven Gems Megaways has the unlimited progressive multiplier and the Lucky Last Spin. 1 Million Megaways BC has a reel layout that no other game in the industry can match. Pirate Kingdom Megaways introduced locking reels to the Megaways format before anyone else thought to try it.
The variable RTP is the main thing to be aware of before you play. The headline numbers are strong, but 88% configurations exist in the catalog and players don't always know which version they're running. Check with SweepKing on which setting is active, particularly on the newer titles.
For players who specifically enjoy high-volatility Megaways slots and want a provider that has actually pushed the format rather than cloned it, Iron Dog is a strong pick. Start with Dwarven Gems Megaways in demo mode on SweepKing for the best introduction to what makes this studio worth your time. The unlimited multiplier in that bonus round will tell you everything you need to know.
FAQ
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User Accounts and/or participate in the Games and/or have any access to the Services capitalized terms herein shall have the meaning as specified in the Terms of Use.
NO PURCHASE NECESSARY TO ENTER SWEEPSTAKES. SWEEPSTAKES ARE VOID WHERE PROHIBITED BY LAW. For detailed rules, see our Terms of Use and Sweepstakes Rules.
Copyright © 2025 WINZILLA LTD. All rights reserved
This website is owned and operated by Winzilla Ltd (operating under the brand name "SweepKing"), a company registered and existing under the laws of the Republic of Cyprus, with registration no. HE 474611, and having its registered office at 39 Dimofontos Street, 3rd Floor, Office 301, Nicosia, 1075, Cyprus. Please contact us at [email protected].
Persons under the age of 18 and/or residents of the Restricted Territories are not permitted to create any User Accounts and/or participate in the Games and/or have any access to the Services capitalized terms herein shall have the meaning as specified in the Terms of Use.NO PURCHASE NECESSARY TO ENTER SWEEPSTAKES. SWEEPSTAKES ARE VOID WHERE PROHIBITED BY LAW. For detailed rules, see our Terms of Use and Sweepstakes Rules.
This website is owned and operated by Winzilla Ltd (operating under the brand name "SweepKing"), a company registered and existing under the laws of the Republic of Cyprus, with registration no. HE 474611, and having its registered office at 39 Dimofontos Street, 3rd Floor, Office 301, Nicosia, 1075, Cyprus. Please contact us at [email protected].
Persons under the age of 18 and/or residents of the Restricted Territories are not permitted to create any
User Accounts and/or participate in the Games and/or have any access to the Services capitalized terms herein shall have the meaning as specified in the Terms of Use.
NO PURCHASE NECESSARY TO ENTER SWEEPSTAKES. SWEEPSTAKES ARE VOID WHERE PROHIBITED BY LAW. For detailed rules, see our Terms of Use and Sweepstakes Rules.
Copyright © 2025 WINZILLA LTD. All rights reserved
This website is owned and operated by Winzilla Ltd (operating under the brand name "SweepKing"), a company registered and existing under the laws of the Republic of Cyprus, with registration no. HE 474611, and having its registered office at 39 Dimofontos Street, 3rd Floor, Office 301, Nicosia, 1075, Cyprus. Please contact us at [email protected].
Persons under the age of 18 and/or residents of the Restricted Territories are not permitted to create any User Accounts and/or participate in the Games and/or have any access to the Services capitalized terms herein shall have the meaning as specified in the Terms of Use.NO PURCHASE NECESSARY TO ENTER SWEEPSTAKES. SWEEPSTAKES ARE VOID WHERE PROHIBITED BY LAW. For detailed rules, see our Terms of Use and Sweepstakes Rules.
Copyright © 2025 WINZILLA LTD. All rights reserved