Endorphina

    Satoshi's Secret

    7.1/10
    Release May 2015· Updated August 2026

    The first slot ever built around bitcoin, released in 2015: six reels, twenty lines, a hacker aesthetic straight out of the cinema, and above all two separate bonus games, the Trading Bonus and the QWERTY Bonus.

    RTP
    96.07%
    Volatility
    Medium
    Grid
    6x3
    Bonus Buy
    Yes
    Grille 6 rouleaux x 3 rangées, 20 lignesWildBonus à sélection d’objets (pick-and-click)Jeu de risque (gamble) sur les gainsThème cryptomonnaie / cyberespace
    Satoshi's Secret
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    7.1

    BetsRank Verdict

    Hands-on testing by Alexandre Dubois — bonus tested, multiple sessions

    Satoshi's Secret is a 2015 game that matters as much for what it represents as for what it offers: the first slot devoted to bitcoin, and the first title in the studio's range to combine six reels with two bonus games. The Trading Bonus and the QWERTY Bonus rest on real player decisions rather than a simple animation, which stays rare and gives the title a texture of its own. The stated medium-low volatility makes this a long-session game rather than one built for a single dramatic result. What BetsRank would draw attention to above all is the return figure: Endorphina publishes it as a range from 89.83% to 96.07%, configured by the operator, and that band is far too wide to skip over. Open the paytable your casino displays before you stake anything. With that one reflex in place, the game remains a solid curiosity, carried by two bonus features that have few equivalents in the studio's catalogue.

    Strengths

    • +Two separate bonus games, both resting on real decisions taken by the player.
    • +Six reels and twenty lines, a structure still uncommon in a 2015 catalogue.
    • +Medium-low stated volatility, suited to long sessions at a modest stake.
    • +Wide stake range, from 0.20 EUR to 200 EUR according to the official game sheet.
    • +Coherent hacker setting, with a genuine historic role in early cryptocurrency casinos.

    To consider

    • RTP published as a range from 89.83% to 96.07%: the build deployed depends on the operator.
    • No win cap communicated by Endorphina, so the real potential is hard to place.
    • Bonus buy unavailable in some jurisdictions and with no official price published.
    • 2015 presentation, less fluid than the studio's more recent productions.

    Satoshi's Secret: Endorphina's first bitcoin slot

    Satoshi's Secret holds a particular place in the Endorphina catalogue. Released in 2015 and cut for the first cryptocurrency casinos, the studio presents it as the very first slot machine devoted to bitcoin. The game was picked for the Game To Watch selection at ICE Totally Gaming 2016, a February that did a great deal for the title's profile.

    It is also the first game in the studio's range to combine two technical firsts: six reels and two bonus games. The grid runs six reels by three rows, for twenty paylines. The look borrows from hacker cinema: black screens, scrolling digits, keyboard keys and currency symbols. On the official paytable the hooded man is the best-paying symbol at 250x the base bet for six in a row, ahead of the pound sterling symbol at 150x. The wild is the "Password" symbol, which substitutes for every symbol except the hooded man and the scatter.

    The two bonus features are independent of one another.

    • Trading Bonus — four padlock symbols scattered across reels 2, 3, 4 and 5 open it. You receive a starting capital and then face a choice: keep the win, or invest it on a simulated foreign exchange market to try to multiply it.
    • QWERTY Bonus — landing the letters of the word QWERTY on the reels launches a bank account hacking sequence. Three levels of protection appear in turn, each attached to a different amount; to secure the sum, it has to be converted into anonymous cryptocurrency before you push too far.

    Alongside those sit the Risk Game, the studio's classic card gamble, and Bonus Pop, the in-house bonus buy, which runs at a lower RTP than the base game and which Endorphina notes is not available at every casino because access depends on the jurisdiction. No purchase price is published for this title.

    One point deserves particular attention: the return to player. Endorphina does not publish a single figure for this game. The studio states an RTP ranging from 89.83% to 96.07%, a band the operator configures. Those are not two competing claims but a floor and a ceiling of the same official range, and the difference between them is wide enough to matter. Whichever build your casino has deployed, the paytable shown inside the game is the only thing that tells you where in that band you are playing, and it is worth opening before you place a stake. Volatility is classified as medium-low by the studio, and the official stake range runs from 0.20 EUR to 200 EUR per spin.

    That volatility profile is worth connecting to the structure. Across six reels and twenty lines, combinations form fairly regularly, and how far a session swings depends mostly on how often the two bonus games open. Neither the Trading Bonus nor the QWERTY Bonus rests on an automatic draw: in both cases the player makes a decision that affects the final amount, which remains uncommon even among recent releases. Endorphina publishes no win cap for this title, and the values found elsewhere vary too much to repeat. The game is playable on mobile with no dedicated app.

    Key mechanics of Satoshi's Secret

    • Six reels by three rows, with twenty paylines across the grid.
    • First game in the Endorphina catalogue to combine six reels with two separate bonus games.
    • Trading Bonus triggered by four padlock symbols scattered on reels 2, 3, 4 and 5.
    • In the Trading Bonus, the player chooses between keeping the capital or investing it on a simulated market.
    • QWERTY Bonus launched by landing the letters of the word QWERTY on the reels.
    • The QWERTY Bonus offers three levels of account protection, each attached to a different amount.
    • "Password" wild substituting for every symbol except the hooded man and the scatter.
    • Official paytable: the hooded man pays 250x and the pound sterling 150x for six symbols.
    • Medium-low volatility as classified by Endorphina, with stakes from 0.20 EUR to 200 EUR per spin.
    • Classic Risk Game plus Bonus Pop, whose availability depends on the jurisdiction.

    Frequently asked questions about Satoshi's Secret

    What is the RTP of Satoshi's Secret?

    Endorphina does not publish a single number.

    The official sheet gives an RTP ranging from 89. 83% to 96. 07%, a band the operator configures when deploying the game. The paytable displayed inside the game at your casino is what tells you where within that range the build you are playing actually sits.

    Why is the RTP given as a range?

    Like many suppliers, Endorphina ships its machines in several return configurations and lets the operator choose which one to run.

    For this title the studio publishes both ends of that band, 89. 83% at the floor and 96. 07% at the ceiling. Checking the in-game paytable before staking is therefore essential.

    How volatile is Satoshi's Secret?

    Endorphina classifies it as medium-low on its official page.

    That profile matches a grid of six reels and twenty lines, where combinations form fairly regularly and where most of the amplitude comes from the two bonus games rather than from the base game paytable on its own.

    How is the Trading Bonus triggered?

    You need four padlock symbols scattered across reels 2, 3, 4 and 5.

    The bonus then awards a starting capital and puts a question to you: secure that amount, or invest it on a simulated foreign exchange market to try to multiply it. The decision belongs entirely to the player.

    How does the QWERTY Bonus work?

    It triggers when the letters of the word QWERTY land on the reels.

    The game switches to a bank account hacking sequence built on three levels of protection, attached to rising amounts. To keep the sum you have reached, it must be converted into anonymous cryptocurrency before you go any further.

    How many reels does Satoshi's Secret have?

    Six reels across three rows, for twenty paylines.

    That was a first for Endorphina in 2015, when most of its catalogue was built on five reels. Combinations therefore read up to six symbols long, which explains the high values on the official paytable for the premium symbols.

    Can you buy the bonus on Satoshi's Secret?

    Bonus Pop, Endorphina's bonus buy, is listed among the game's features.

    The studio notes that it is not available at every casino, since access depends on the jurisdiction, and that it runs at a lower RTP than the base game. No purchase price is published, so any cost appears in the casino interface.

    What is the maximum win on Satoshi's Secret?

    Endorphina publishes no overall cap, and the values recorded by third-party sources differ too widely to be repeated here.

    The documented reference remains the official paytable, where the hooded man pays 250x the base bet for six symbols, ahead of the pound sterling symbol at 150x.

    What are the minimum and maximum stakes?

    The official page lists a range of 0.

    20 EUR to 200 EUR per spin. That spread suits small stakes as comfortably as more committed sessions. Individual casinos can narrow the range according to their jurisdiction, their own internal limits, or the terms attached to a bonus you currently have running.

    Can Satoshi's Secret be played on mobile?

    Yes, Endorphina confirms the game is available on mobile.

    No app is needed, since the session starts from the browser or from the casino's own app. Both bonus games, which rely on dedicated screens and on choices you have to make, stay usable by touch on a phone screen.

    Why is this game considered historic?

    Endorphina presents it as the first slot machine ever devoted to bitcoin, designed for the first cryptocurrency casinos that appeared in 2015.

    The title was then picked for the Game To Watch selection at ICE Totally Gaming 2016, which helped establish the studio with international operators.

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    Slot sheet last updated on · Sources: slotcatalog.com, official provider sites, BetsRank hands-on testing