STHLM Gaming is a small Stockholm studio whose confirmed slots date from 2017 to 2020, from the fruit reels of Stacks of Riches to the winged hero of Icarus Wilds. Most of them went out through Relax Gaming, and the STHLM Gaming casinos in our database are where you can still find them.
Below the list: who started the studio, the three owners it has had since, how its games reach casinos and what to check before you sign up.
Reviewed byFred Anderson
Best Casino Bronze
Rated 93 of 100%
welcome bonus
100% up to €6,500 + 180 FS
Big Bonus
Rated 91 of 100%
welcome bonus
325% up to €5,000 + 200 FS
Rated 90 of 100%
welcome bonus
250% up to €4,500 + 300 FS
Hot Casino
Rated 95 of 100%
welcome bonus
243% up to €5,555 + 243 FS
Rated 94 of 100%
welcome bonus
400% up to €2,000 + 230 FS
Rated 93 of 100%
welcome bonus
up to €10,000 in Wheel of Winz
Rated 94 of 100%
welcome bonus
1150% up to €1,000 + 250 FS
Rated 94 of 100%
welcome bonus
100% up to €100
Rated 92 of 100%
welcome bonus
100% up to €500
Rated 94 of 100%
welcome bonus
100% up to €1,250 + 125 FS
Rated 92 of 100%
welcome bonus
100% up to €200
Rated 90 of 100%
welcome bonus
100% up to €100 + 100 FS
Rated 87 of 100%
welcome bonus
100% up to €300 + 150 FS
Rated 87 of 100%
welcome bonus
325% up to €500 + 100 FS
Rated 87 of 100%
welcome bonus
100% up to $500 + 500 FS
What is STHLM Gaming known for?
STHLM Gaming is a Stockholm slot studio founded in 2016 by Jonas Byström and André Nylander. It is known for simple, clean video slots such as Stacks of Riches, Boost It, Perfect Catch and Icarus Wilds, distributed through Relax Gaming's Silver Bullet programme. Spiffbet bought the studio in 2019, and Million Games has owned it since 2023.
The name gives the game away. STHLM is the everyday Swedish shorthand for Stockholm, and that is where Jonas Byström and André Nylander founded the studio in 2016. The first slot followed in 2017, and by mid 2019 the portfolio had grown to six games, according to reports on the takeover that year.
Byström, the CEO, described the goal in 2018 as engaging games with clean presentation and intuitive gameplay, and the specs back him up. These are mostly 5×3 slots with one or two ideas each, not feature monsters with five bonus modes. Tom Galanis of the affiliate service First Look Games, which added the studio to its roster, put it as simple games that still pack a punch. If you like a slot you can understand in one spin, that is a compliment.
Few small studios change hands this often. This is the chain as far as the public record goes:
Spiffbet’s CEO said the purchase had paid off, but that the company lacked the resources to develop games next to its casino business. Million Games, run by founder Thomas Nimstad, received a Swedish licence from Spelinspektionen in November 2025.
STHLM never built a casino platform of its own. In October 2018 Relax Gaming added the studio to Silver Bullet, its programme for partner studios, starting with Van Gogh, Stacks of Riches and Boost It. Relax’s product chief Simon Hammon said STHLM matched Relax’s own ambitions.
A 2019 report on the Spiffbet deal described two routes: direct sales to one European operator and indirect sales through a network, mainly in Europe, with distribution set to continue through the same channels after the takeover. In practice that makes Relax the main road into STHLM Gaming casinos, so if a casino runs the Relax catalogue, it is worth looking for these titles. Our Relax Gaming casinos page lists those casinos.
SlotCatalog now files these games under Million Games, the current owner. Here is what it lists for six of them:
| Slot | Released | Layout | RTP |
|---|---|---|---|
| Stacks of Riches | October 2017 | 5×3, 10 lines | 95.91% |
| Boost It | February 2018 | 5×3, 243 ways | 97% |
| Perfect Catch | March 2019 | 5×3, 20 lines | 96.32% |
| The Golden Chase | June 2019 | 5×3, 243 to 1,024 ways | 96.27% |
| Ricky Riches | December 2019 | 5×3, 243 ways | 96% |
| Icarus Wilds | March 2020 | 5×3, 243 ways | 96.54% |
Boost It has the highest RTP of the set and a Booster Reel that can add random wilds, wild reels and multipliers. Icarus Wilds has the tallest ceiling: SlotCatalog puts its top win at 16,864x, and in free spins the grid grows to 5×4 with 1,024 ways.
If the fruit games feel too plain, these three 2019 releases are the ones to look for at STHLM Gaming casinos.
A pond of frogs and fish on 20 lines, with random wilds, multipliers and free spins. SlotCatalog lists a top win of 2,787x.
Gemstones on white silk. It starts on 243 ways, and respins push the count up step by step, through 324, 432, 576 and 768, to 1,024. SlotCatalog calls it a fairly volatile game, with a top win of 6,699x.
A retro lucky clover slot from December, with a pick bonus, stacked symbols, multipliers and free spins. SlotCatalog lists medium to high volatility and a top win of 4,800x.
The list at the top of this page shows the open STHLM Gaming casinos in our database, with closed and blacklisted sites left out. A small back catalogue like this rarely decides where you play, so let the casino earn your deposit first.
Its licence has to cover the country you live in, and if online casinos are not legal there, do not play. The Swedish licence Million Games holds covers its supply of games in Sweden, and it does not make any casino safe. Then read our review for withdrawal limits, processing times and when identity checks happen.
Last, the game details. Open the info screen to see which RTP the casino runs, and if you take a bonus at one of the STHLM Gaming casinos, check whether older slots from smaller studios count in full towards the wagering. For other studios, our game provider directory lists everything we cover.
Million Games, a Swedish studio led by its founder and CEO Thomas Nimstad. It bought all shares in STHLM Gaming Sweden AB from Spiffbet in August 2023, together with the Rhino Gaming portfolio.
The newest STHLM title we could confirm is Icarus Wilds from March 2020. Million Games keeps releasing games, such as the crash game Chicken X, but under its own name. The older slots are still listed, so STHLM Gaming casinos can carry them.
Stockholm, Sweden. That is also where the name comes from: STHLM is the common Swedish shorthand for the city.
Mainly through Relax Gaming, which added the studio to its Silver Bullet programme in October 2018. A 2019 report said the studio also sold directly to one European operator.
Of the six we checked, Boost It has the highest figure on SlotCatalog at 97%. Check the info screen at STHLM Gaming casinos, because the version on offer can differ.
That depends on the casino, not the studio. Start with the list at the top of this page, which only shows open casinos, then pick one licensed where you live with clear withdrawal terms.
STHLM is one of the smaller names on our books, and the index below puts it next to every other studio we cover, each with its count of open casinos.
No studio matches that search.
The Author
The Author
Site Admin
