2022 Hit Slot
- RTP
- 96.03%
- Volatility
- High
- Reels
- 5
- Lines
- 22
- Released
- 2022-03
- Theme
- Classic
Provider
Endorphina
- Founded
- 2012
- Games in catalogue
- ~240
- Signature style
- Bold art, classic to unconventional
Endorphina is a Prague-based studio founded in 2012, with a catalogue of roughly 240 games and a reputation built on two things: a striking, sometimes deliberately provocative visual style, and – more usefully for a player – one of the few honest RTP policies in the industry.
Game Style
The catalogue ranges from stripped-back classic reel slots to genuinely unconventional modern releases. Endorphina has never been shy about subject matter: taboo themes, satire and jokes that most suppliers would route around appear regularly, and the art direction is consistently sharper than the mid-tier position suggests.
Underneath that, the games are more conservative than they look. Volatility spans a wide range, structures are conventional, and the maths are unusually stable from one release to the next.
Signature Mechanics
- Expanding and stacked wilds – the most common feature across the catalogue, usually tied to free spins.
- Multiplier symbols – values that apply to the whole win rather than a single line.
- Bonus Pop – a paid entry into the feature round on selected titles.
- Pay Anywhere and cascading reels – used across the modern part of the range.
- RTP+ – the studio’s progressive jackpot technology, designed to add a jackpot layer without lowering the base game’s return. That is the opposite of how most jackpot systems work, and it is worth understanding: on a conventional progressive, part of your bet is diverted out of the base paytable to fund the pot.
Licensing and Fair Play
Endorphina holds a Malta Gaming Authority licence, its games are certified by Gaming Labs, and the studio carries ISO certification for its processes.
The important part is the RTP policy. Endorphina publishes fixed return values and does not offer casinos a menu of configurations to choose from. On this site that makes it a genuine outlier – Hacksaw ships builds from 88% to 96%, ELK from 87% to 96.4%, NetEnt from 90% to 99%. With Endorphina, the number in the review is the number at the casino. For a player who tracks returns, that predictability is worth more than a fractionally higher headline figure that may not be the one installed.
Games Worth Knowing
Beyond the five titles below, Satoshi’s Secret was an early crypto-themed slot released in 2015, well ahead of the market’s interest in the subject. The Chance Machine series covers the studio’s classic three-reel end. Twerk, Taboo and Voodoo are the titles that gave Endorphina its reputation for going where competitors will not, and the annual Hit Slot series – one release a year, each a variation on the last – is the closest thing the studio has to a franchise.
Mobile Play and Demos
All slots are fully optimised for mobile, and the studio’s clean, high-contrast art style survives the small screen better than most. Free demo versions are available for every game. Because the published RTP is fixed, the demo here is for judging the game rather than for checking which configuration you have been given.
What the Numbers Say
The five titles here span a decade, from Satoshi’s Secret in 2015 to the 2024 Hit Slot, with RTP tightly grouped between 96.00% and 96.05%. Volatility ranges from low on the 2024 release to high on the 2022 and 2023 editions of the same series, so the annual instalments are not simply reskins.
Consistent maths, a fixed-RTP policy and a genuine sense of humour, which is rarer in this industry than it should be.
Popular Endorphina Games
2023 Hit Slot Dice
- RTP
- 96.01%
- Volatility
- High
- Reels
- 6
- Lines
- 4096
- Released
- 2023-12
- Theme
- Dice
2024 Hit Slot
- RTP
- 96.05%
- Volatility
- Low
- Reels
- 5
- Lines
- 10
- Released
- 2024-02
- Theme
- Classic
2027 ISS
- RTP
- 96%
- Volatility
- Medium
- Max win
- 90000 credits
- Reels
- 5
- Lines
- 9
- Released
- 2017-04
- Theme
- Sci-Fi
Satoshi’s Secret
- RTP
- 96%
- Volatility
- Medium
- Max win
- 500000 credits
- Reels
- 6
- Lines
- 20
- Released
- 2015-05
- Theme
- Crypto
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Common Questions
What is Endorphina known for?
Striking, distinctive visual art direction across a slot catalogue spanning classic and modern formats – and for publishing fixed RTP values rather than letting casinos choose from a range of configurations.
Is Endorphina a licensed provider?
Yes. It holds a Malta Gaming Authority licence, its games are certified by Gaming Labs, and the studio carries ISO certification for its processes.
Does Endorphina use variable RTP?
No, and this is the most practically useful thing about the studio. It publishes fixed return values, so the figure you read in a review is the figure running at the casino. Most suppliers on this site ship several configurations and let the operator pick – Endorphina does not.
What is RTP+?
Endorphina’s progressive jackpot technology, designed to add a jackpot layer without reducing the base game’s return. On a conventional progressive, part of every bet is diverted out of the base paytable to fund the pot, which is why jackpot slots usually publish a lower base RTP. RTP+ is built to avoid that trade-off.
Are the annual Hit Slot releases just reskins?
No. They share a name and a house look, but the maths differ between instalments – volatility ranges from low on the 2024 edition to high on the 2022 and 2023 ones. Check the specifications rather than assuming this year’s version plays like last year’s.
Why are some Endorphina themes so provocative?
It is a deliberate positioning choice. Titles like Twerk and Taboo exist because the studio decided that standing out mattered more than being safe for every market. Some operators will not carry them, which is part of the trade.
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