Guide
Where a Slot's Figures Come From, and How to Tell a Sourced Number from a Copied One
Short answer
Return, volatility, hit frequency and maximum win are not equally well evidenced. One has a first-hand source, one is barely standardised, and most of what circulates was copied rather than checked.
Four numbers, four different levels of evidence
A slot's specification is usually presented as a single block: return to player, volatility, hit frequency, maximum win, grid, stake range, release date. It reads as one set of facts of equal standing. It is not. Some of those figures have a first-hand publisher, some exist in no standard form at all, and a good share of what circulates online has been copied from a page that copied it from somewhere else.
Other guides here explain what each number means. This one is about a different question, and it is the one that decides whether the number is worth anything: who published it, and how would you check?
The studio is the only first-hand source
Every figure about a game originates with the company that built it. A studio knows the return because it configured it, knows the hit frequency because it simulated it, and knows the maximum payout because it capped it. Nobody outside can measure any of these — a return of 96% is an average over millions of spins, and no amount of playing produces a reliable estimate of it.
What studios actually publish varies enormously. Some put out a complete block for every title. Some publish a return and nothing else. Some publish nothing at all and leave the whole vertical to guess. That variation is the single most useful thing to know, because it tells you which figures on any other page could possibly have a source.
Why two databases disagree
When two sites give different numbers for the same game, the temptation is to average them or to trust the better-designed page. Both are mistakes. Figures that circulate without a studio behind them have usually been copied, sometimes several times, and a copying chain does not converge on the truth — it preserves whatever the first transcription error was.
The tells are recognisable once you look for them. A figure quoted to more decimal places than the studio publishes. A maximum win rounded to a clean number when the studio's own figure is not clean. A specification identical across a dozen sites, word for word, including its gaps. And a figure attached to a game whose studio publishes nothing at all, which is the clearest signal of the set: there was no source to copy from, so somebody supplied one.
Volatility is the softest number on the page
There is no industry standard for volatility. Some studios publish a numeric score on a scale of their own choosing. Some publish a word. Many publish nothing, and the word you see was assigned by whoever wrote the page. Two studios' idea of high is not the same idea, and a score out of ten from one developer cannot be compared with a score out of five from another without a conversion nobody has agreed on.
This does not make volatility useless. It makes it a figure that has to be read together with its source, and it means a volatility rating with no publisher named is an opinion rather than a specification.
Even a first-hand page can contradict itself
Studio pages are marketing material as well as documentation, and the two halves are not always written by the same hand. It is not unusual for a page to give one line count in its prose and another in its specification block, or to name a feature it never describes, or to state a release date that belongs to a re-release rather than to the original game.
When that happens the honest response is to report the conflict rather than resolve it. Picking one figure and staying quiet publishes a guess with a citation attached, and averaging two numbers produces a third that nobody published at all.
A check that takes two minutes
- Go to the studio's own page for the exact title. Not a database, not an aggregator. The developer's site is the only place a figure starts.
- Note what it does not publish. A blank is information. If the studio states no hit frequency, then no page anywhere has a sourced one.
- Compare the release date against the name. A recent date on an old famous title means you are reading about a rebuild.
- Open the game's own information panel for the return. The studio's figure describes the game; the panel describes the build your casino deployed, and those can differ by several points.
- Where sources disagree, keep both. Note who says what. A stated disagreement is more useful than a confident average.
Play responsibly
One last thing worth saying plainly. Even a perfectly sourced specification describes long-run behaviour across millions of spins, not what will happen in the next hour. Checking the figures is how you avoid being misled about a game; it is not a method for predicting one. Deposit and time limits set before you start do work that no amount of accurate data can do for you.
Before you act on this
You must be of legal gambling age where you live — 18 in most markets, 19 or 21 in others. Gambling is entertainment, not a way to make money, and everything here assumes you are staking money you can afford to lose. Check the rules in your own market first, and set deposit and time limits before you play.
Terms this guide uses
Definitions for the terms above, so nothing here depends on a word you have to guess.