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One game, several percentages: how RTP versions work

A slot’s return percentage is not a property of the game in the way its theme or number of reels is. It is a setting – and studios often offer it to casinos in several variants. Here is what that means for you and for our tables.

Same graphics, different payout maths

When a studio releases a slot, it rarely ships it to casinos in just one form. There is usually a default configuration plus one or more alternatives that differ in theoretical return. Visually they are indistinguishable: the same symbols, the same features, the same music.

The difference lies hidden in how often individual combinations land and how often the bonus feature triggers. Choosing a specific version is up to the casino operator, not the player.

Why do studios do this? Casinos work in different markets and with different business models, so a single game can be used everywhere without having to be redrawn. For you, one simple point follows: the figure you read on a studio’s website may not be the figure that applies at the casino where you are playing right now.

What shifts between versions and what stays put

Not every property of a game changes with the version. The overview below is general – a given studio may have its own rules, so the documentation of the game in question always decides.

Game property Changes with RTP version? Where to verify it
theoretical return (RTP) yes, that is the whole point of a version rules or paytable of the launched game
look, symbols, features as a rule, no the game itself
bonus feature frequency may change the studio publishes it only sometimes
max win usually not, exceptions exist game rules, the studio’s game page
volatility label studios mostly give one for all versions the studio’s game page
RTP of a bought bonus may have its own percentage game rules, if the game has a bonus buy

The most common misunderstanding comes from the last row. Buying a bonus round sometimes runs at a different return than regular spins, and the studio then lists it as a separate figure.

Look for the valid percentage in the launched game, not the lobby

The only place where you see the version the casino has actually deployed is the game itself. The steps differ between studios only in the details:

  1. Launch the game (opening it is enough; you do not need to spin).
  2. Find the “i” icon, the question mark or the rules menu – on mobile it is often hidden in a side menu.
  3. Scroll the rules to the very end. The theoretical return is usually stated in the last paragraph, often alongside a note about game malfunctions.
  4. If the game offers a bonus buy, check whether a separate percentage is listed for it.

The public Dukat.bet lobby API contains no RTP at all. And on the snapshot date of 12 October 2026, the lobby’s “High RTP” tab gathered titles containing the word “Hot”, not titles with a high return – so it cannot serve as a guide.

When the game rules give no percentage at all, we do not invent one for the table.

Default version or the full range: how we record it

Since the lobby does not tell us which version Dukat.bet uses for a given game, our tables show what the studio publishes. If the studio gives only the default RTP, we record it as a single figure. If it publishes the whole set of versions, we show the range from lowest to highest.

In the list sorted by RTP – the 2026 releases by return – the order follows the studio’s default value. The range only adds the information that a lower configuration may also be running at the casino.

For every figure, the “Source type” column states where it comes from: studio (official), 2 independent sources, or not published. The full hierarchy of sources and the tie-break rules are described in the snapshot methodology.

Return, volatility, cap: three numbers for three questions

RTP answers the question of how much of the money staked a game pays back on average over a vast number of rounds. It says nothing about how your evening will go.

Volatility describes how the game gets to that average – through small, frequent wins or through rare, larger ones. Two games sharing one RTP can behave in entirely different ways. And studios label it on different scales, so “high” at one may not mean the same thing at another.

The max win is a ceiling, normally given as a multiple of your bet. It marks a limit, not an expectation.

Each of the three numbers is a separate data point. Even a higher RTP will not make you come out ahead, and a higher cap is no sign you will ever get near it.

Two versions of the same game on paper

Sample calculation with fictitious numbers – not Dukat.bet data:

Picture a game in two configurations, 96% and 94%. You play 1,000 rounds at 0.20 EUR, which means you stake 200 EUR in total.

96% version 94% version
total staked 200 EUR 200 EUR
theoretical return 192 EUR 188 EUR
theoretical loss 8 EUR 12 EUR

On paper the gap is 4 EUR – the lower version loses half as much again. Yet a thousand rounds is a small sample in mathematical terms, and the actual result can stray from the theoretical one by tens of euros in either direction.

So the version shapes the long-run average, not what happens today.

When two websites show a different figure for the same game

The most common explanation is a plain one: one website lists the default version, the other the one it saw at a particular casino. Other possibilities are a game update on the studio’s side or a mix-up with the bonus buy percentage.

If the figure in our snapshot differs from what you see in the game rules at Dukat.bet, the in-game figure always applies to your play. You help us by sending the discrepancy through the contact page – with the game name and the date you saw it.

Frequently asked questions

Can I choose a game’s RTP version myself?
No. The casino picks the configuration when it sets up the game. At most, a player decides whether to use a feature with its own percentage, such as a bonus buy.
Is a game in a lower version “set to lose”?
Not in the sense that the results are any less random. Every version carries an edge for the casino; the lower version simply carries a bigger one.
Why do you show a range instead of one figure for some games?
Because the studio has published several configurations and the public data does not tell us which one the casino uses. The range shows the band the figure may fall within.
Does the RTP version affect the order in the lists sorted by release date?
No. Each list has one key. RTP decides only in the lists that are explicitly sorted by it.
Does RTP change when I play with a bonus?
Playing with a bonus leaves the game’s mathematics untouched. What changes are the conditions under which bets count towards wagering – those are set by the bonus rules, not by the game.
Does every studio list all its RTP versions?
No. Some publish the whole set, others only the default value, and for older games some not even that. In that case you will see the source type “not published” in the table.
Updated: 2026-10-12 Checked by the editorial team

One game, several percentages: how RTP versions work

Why studios ship the same game to casinos in several RTP configurations, how to find the valid figure in the game rules and how we record it in ducat888.win snapshots.

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