Plate 001 Withdrawn 2017 Television
South Park Reel Chaos
NetEnt · Comedy Central
RTP 96.8%
Volatility Medium
Max win —
Reels & lines 5 × 3, 20 lines
Released 2014
Cross-checked: SlotCatalog and AskGamblers
01 / The licensed slot archive
Online slots UK — the best licensed titles measured on real RTP data
The licensed online slots UK casinos have run, catalogued with the return-to-player figure, volatility band and provider for each. Including the titles that were withdrawn.
Browse the slot indexReviewed
Reel picker / spin to surface a catalogued title — the payline reads out its data No stake · no wager · a browse tool
Reel picker
RTP—
Volatility—
Max win—
Released—
Reels & lines—
Now showing
South Park Reel Chaos
Titles catalogued
6
Withdrawn
2
Providers
5
Mean RTP (5 of 6)
95.5%
02 / Core dataset
Three of six shown — the full index carries every record Licensed titles reviewed against RTP
Plate 002 Film
Jurassic Park Gold
Stormcraft Studios · Universal Games and Digital Platforms
RTP (default) 96%
Also ships at 94% / 92%
Volatility High
Max win 8 000×
Reels & lines 5 × 4, 40 lines
Released 2022
Cross-checked: SlotBeats and SlotCatalog
Plate 004 Withdrawn 2016 Comics
The Dark Knight
Microgaming · DC Comics / Warner Bros.
RTP —
Volatility —
Max win —
Reels & lines 5 reels, 243 ways
Released 2012
RTP not established — sources disagree, so no figure is published
Tile: the game's own title screen. The game was withdrawn in June 2016 and no promotional tile survives.
03 / What the maths actually does
What RTP and volatility actually mean
At 96% return-to-player the house keeps £4 of every £100 staked, on average, across millions of spins. Over ten thousand spins the spread of outcomes is wide, and most sessions finish down. Every figure on the plates above is cross-checked across independent databases, because no provider publishes this material publicly. Where the sources disagree, the field stays empty.
Read how RTP is measured
04 / Using the catalogue
How to pick the best online slots UK players can actually verify
This is a reference catalogue of the online slots UK casinos have offered, not a recommendation engine. It records what licensed slot machines published, what they paid back, and in several cases the date they were switched off. Nothing here is ranked, because a ranking would need a judgement we cannot source.
What can be sourced turns out to be more useful anyway. Take one of the entries above. Its return is not a single number at all. It shipped at 96%, 94% and 92%, and the casino serving it decides which version runs. Three of the six titles catalogued here work that way.
So the headline percentage on any review page, including this one, describes a game rather than the game in front of you. The figure that matters is the one inside the information panel at the site where you are playing. The rules require that it be available to you before you commit. Anyone comparing the best online slots UK casinos offer should read it there and nowhere else.
Everything else in this catalogue exists to help you read that one number properly.
What the UK online slots RTP data shows
Across the entries with an established return, the mean sits a little under 96%. That is the UK online slots RTP baseline every plate is drawn against. That is unremarkable, and the interesting part is the variation around it. One title from 2012 published 91.46%, four points below the mean. That is the difference between a four-and-a-half pence and an eight-and-a-half pence expected cost per pound staked.
One entry has no return at all. Four separate sources give The Dark Knight three irreconcilable figures, and a fourth number circulates with nothing behind it. So the field is blank. An unsourced figure dressed as a specification is worse than an admission that nobody knows.
The UK online slots RTP picture is also shaped by rules that have no equivalent in most markets. A spin cannot repeat faster than every two and a half seconds. Autoplay is banned. Stakes are capped at £5, or £2 under the age of twenty-five. None of that changes the house edge, and all of it changes how fast the edge reaches you.
Why withdrawn titles are catalogued too
Between 2016 and 2017 most of the big licensed slots in Britain were switched off within about ten months. Playtech’s Marvel suite went on 31 March 2017 when the licence expired. Both Microgaming Batman titles went in June 2016, and NetEnt’s South Park games went that following spring.
Those pages are still indexed, still describing games as though you could play them. Keeping a dated record of what left seemed more useful than quietly deleting the entries. Providers almost never state a reason, and we say so. Two of the six titles here are in that position, and both keep their full specification record.
Questions about this catalogue
Does this site rank the best online slots UK casinos offer?
No. It is a reference catalogue, not a league table. Most best online slots UK lists order operators without ever stating a basis. We record published returns, volatility bands and withdrawal dates, and we say where each figure came from.
Where does the UK online slots RTP data here come from?
From independent slot databases, cross-checked so that no figure rests on a single source. No major provider publishes RTP on a public web page, so a provider specification is not available to cite. Two independent databases have to agree before an entry goes into the catalogue at all.
Why does one game have no RTP listed?
Because the sources contradict each other. The Dark Knight has three irreconcilable published returns, plus a fourth figure with no source at all. We leave the field empty rather than pick one. Three mutually exclusive numbers cannot be averaged into a fourth that is somehow more true.
Can the same slot pay differently at different casinos?
Yes, and it is the least understood thing about the format. Many titles are certified at several returns and the operator chooses which to run. Check the figure inside the game itself. Three of the six titles catalogued here ship at more than one setting.
Why include games that were withdrawn?
Because people still search for them and most pages still present them as playable. A dated record of what left, and when, is more honest than a stale catalogue entry with a play button. Two of the six entries here are withdrawn, and both keep their full specification record.
Is any of this gambling advice?
No. It describes how these products are priced and how the published figures behave. If gambling has stopped feeling like a choice, the National Gambling Helpline is free on 0808 8020 133 at any hour. Nothing here recommends a game, a site or a stake.