Thunderkick · tested on the official demo server
Thunderkick slots tested: measured vs declared RTP
6 Thunderkick slots have been run on the provider's official demo server: 60,000 logged rounds. Together they returned a mean measured 90.3% against a mean declared 96.14%; in the median game a natural bonus arrived once per 222 rounds, and the 4 games that sell their bonus returned 0.82x of the price per purchase on average. The table is sorted by the measured figure and re-sorts itself when a new test is published.
- 163 slots tested
- 2,820,000 logged rounds
- official demo servers
- human-checked
Thunderkick slots ranked by measured RTP
- slot · tested / balance curve
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Beat the Beast: Cerberus’ Inferno
Thunderkick · 10,000 spins
2026-10-15
curve
RTP
97.9% 96.2%
hit30%
max152x
buy—
bonus4.3 bHz
dry24
-
Pink Elephants 2 – Reborn
Thunderkick · 10,000 spins
2026-10-13
curve
RTP
93.6% 96.1%
hit24%
max120x
buy0.68x
bonus6.5 bHz
dry24
-
Beat the Beast: Kraken’s Lair
Thunderkick · 10,000 spins
2026-10-13
curve
RTP
88.9% 96.1%
hit24%
max111x
buy—
bonus5.8 bHz
dry37
-
Beat the Beast: Griffin’s Gold – Reborn
Thunderkick · 10,000 spins
2026-10-16
curve
RTP
88.5% 96.1%
hit29%
max50x
buy1.10x
bonus4.4 bHz
dry21
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Midas Golden Touch – Reborn
Thunderkick · 10,000 spins
2026-10-13
curve
RTP
87.7% 96.2%
hit18%
max174x
buy0.81x
bonus4.6 bHz
dry32
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Esqueleto Explosivo 2 – Reborn
Thunderkick · 10,000 spins
2026-10-13
curve
RTP
85.3% 96.1%
hit31%
max162x
buy0.71x
bonus2.1 bHz
dry18
Thunderkick in the lab at a glance
measured first, declared next to it- mean measured / declared RTP 90.3% / 96.14% declared inside the 95% band in 5 of 6 tests
- natural bonus, median game once per 222 rounds a bonus round paid 63x the stake in the median game
- bonus buy, mean return of price 0.82x 200 tickets in 4 games, 71% paid less than they cost
- largest round logged 768x in Beat the Beast: Griffin’s Gold – Reborn · stake-multiple of one round, bonus included
How Thunderkick compares with the rest of the lab
same rig, same run length, same stake ruleEvery Thunderkick game here went through the same run as every other game in the lab: the official demo build, a long series of ordinary rounds at one stake, every server response logged, bonus purchases where the game sells them. That makes the provider comparable with the rest of the catalogue on the measures that matter to a player rather than on a brochure: the gap between measured and declared return, how often a round pays, how long the dry runs get, how often the bonus arrives and what it pays when it does.
Across the 6 Thunderkick tests the measured return sits 5.8 points below the declared figure on average, against 0.3 points below for the other providers. A gap of a point or two either way is sampling noise on runs of this length; what the table shows more reliably is the rhythm of the games, the hit rate, the bonus interval and the share of the return that arrives through the bonus round.
6 tests, 60,000 logged rounds in 6 runs. Measured 90.3% against declared 96.14% on average; 5 of 6 tests came in below the declared figure. Hit rate from 18.0% to 30.7%, longest dry run 37 spins. Data as of 2026-10-16.
| measure | Thunderkick | other providers | whole lab |
|---|---|---|---|
| tests | 6 | 157 | 163 |
| logged rounds | 60,000 | 2,760,000 | 2,820,000 |
| mean measured RTP | 90.3% | 96.1% | 95.9% |
| mean declared RTP | 96.14% | 96.39% | 96.38% |
| measured minus declared, mean pts | −5.8 | −0.3 | −0.5 |
| declared inside the 95% band | 83% | 94% | 94% |
| tests below the declared figure | 83% | 54% | 55% |
| hit rate, median | 26.7% | 26.5% | 26.5% |
| longest dry run, median spins | 24 | 28 | 28 |
| natural bonus, median interval | 1 / 222 | 1 / 238 | 1 / 233 |
| bonus round pays, median game | 63x | 75x | 75x |
| share of return from bonus rounds, median | 37% | 32% | 32% |
| games selling a bonus | 4 / 6 | 109 / 157 | 113 / 163 |
| bonus buy, mean return of price | 0.82x | 0.94x | 0.93x |
| median bought ticket, of price | 0.52x | 0.49x | 0.49x |
| bought tickets below their price | 71% | 73% | 73% |
How often Thunderkick slots trigger the bonus, and what it pays
natural triggers only, the buy button left aloneIn the median Thunderkick game a natural bonus arrived once per 222 rounds, 4.5 triggers per 1,000 rounds; the quickest trigger in the set belongs to Pink Elephants 2 – Reborn (once per 154 rounds), the slowest to Esqueleto Explosivo 2 – Reborn (once per 476). A bonus round in the median game paid 63x the stake, trigger spin included, and bonus rounds supplied about 37% of everything these games returned.
The interval is the number of ordinary rounds per trigger over the whole run; the longest wait is the widest gap between two triggers. Both are compared across every provider in the bonus frequency report, and the frequent free spins ranking sorts all tests by the same interval.
| game | triggers | interval | longest gap | bonus mean |
|---|---|---|---|---|
| Pink Elephants 2 – Reborn | 65 | 1 / 154 | 827 | 52x |
| Beat the Beast: Kraken’s Lair | 58 | 1 / 172 | 1,058 | 68x |
| Midas Golden Touch – Reborn | 46 | 1 / 217 | 683 | 58x |
| Beat the Beast: Griffin’s Gold – Reborn | 44 | 1 / 227 | 1,337 | 98x |
| Beat the Beast: Cerberus’ Inferno | 43 | 1 / 233 | 782 | 93x |
| game | triggers | interval | longest gap | bonus mean |
|---|---|---|---|---|
| Esqueleto Explosivo 2 – Reborn | 21 | 1 / 476 | 1,813 | 53x |
| Beat the Beast: Cerberus’ Inferno | 43 | 1 / 233 | 782 | 93x |
| Beat the Beast: Griffin’s Gold – Reborn | 44 | 1 / 227 | 1,337 | 98x |
| Midas Golden Touch – Reborn | 46 | 1 / 217 | 683 | 58x |
| Beat the Beast: Kraken’s Lair | 58 | 1 / 172 | 1,058 | 68x |
Thunderkick bonus buys: what the purchases returned
every ticket logged at the listed price4 of the 6 tested Thunderkick games sell their bonus. Across 200 logged purchases they returned 0.82x of the ticket price on average; the median ticket came back at 0.52x and 71% of all tickets paid less than they cost. 1 of the 4 games averaged at or above the price. The best average belongs to Beat the Beast: Griffin’s Gold – Reborn (1.10x per ticket), the worst to Pink Elephants 2 – Reborn (0.68x).
A mean above 1.0x means the purchases returned more than they cost over the series; a median below it means most single tickets lost. How the providers compare on both is in the bonus buy report by provider, and the best bonus ranking sorts every game by the same mean return.
| game | price | mean | median | below price | best ticket |
|---|---|---|---|---|---|
| Beat the Beast: Griffin’s Gold – Reborn | 125x | 1.10x | 0.60x | 30 / 50 | 9.8x |
| Midas Golden Touch – Reborn | 80x | 0.81x | 0.57x | 35 / 50 | 3.1x |
| Esqueleto Explosivo 2 – Reborn | 75x | 0.71x | 0.45x | 37 / 50 | 3.4x |
| Pink Elephants 2 – Reborn | 60x | 0.68x | 0.38x | 40 / 50 | 4.2x |
The biggest rounds in Thunderkick tests
one spin and everything it triggered, against the advertised capThe largest single round in the Thunderkick runs is 768x the stake, logged in Beat the Beast: Griffin’s Gold – Reborn. The table measures each game's best round against the maximum win its provider advertises; how far the whole lab gets from those ceilings is the subject of the max win report.
| game | largest round | advertised cap | share of cap |
|---|---|---|---|
| Beat the Beast: Cerberus’ Inferno | 713x | 6,666x | 10.7% |
| Pink Elephants 2 – Reborn | 440x | 10,000x | 4.4% |
| Esqueleto Explosivo 2 – Reborn | 200x | 5,000x | 4.0% |
| Beat the Beast: Kraken’s Lair | 297x | 7,777x | 3.8% |
| Beat the Beast: Griffin’s Gold – Reborn | 768x | 22,222x | 3.5% |
About Thunderkick and how its games were tested
open data, closed rigThunderkick is a Stockholm-based provider founded in 2012, known for Pink Elephants, Esqueleto Explosivo and Beat the Beast; its "Reborn" editions re-release older titles with updated maths. Bonus buys are offered on most of the catalogue at prices that vary by game.
Each Thunderkick review lists its runs under Test record with downloadable round logs and SHA-256 checksums, the rules screens of the tested build and a free demo of the game. The declared RTP shown next to every measurement is the profile the provider's demo server reported for that build; casinos may run a lower version of the same game, which the game's own help screen states. The method is described on How we test.
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Rankings across all providers: best RTP, best bonus, max win, frequent free spins; the full catalog lists every test.
Questions about Thunderkick slots
5 questionsWhich Thunderkick slot has the highest measured RTP?
Beat the Beast: Cerberus’ Inferno, at 97.9% measured over 10,000 logged rounds against a declared 96.15%. The lowest measured return among the tested Thunderkick games is Esqueleto Explosivo 2 – Reborn at 85.3%. Both figures are what the official demo server returned in the lab's runs as of 2026-10-16; the ranking at the top of this page re-sorts itself when a test is published.
What RTP do Thunderkick slots actually return?
Across 6 tests the mean measured return is 90.3% against a mean declared 96.14%. In 5 of 6 tests the declared figure sits inside the 95% band of the measurement, and 5 tests came in below it. Measured RTP describes one long sample per game, not a payout rate a casino is bound to repeat.
How often do Thunderkick slots trigger free spins or the bonus?
In the median tested game once per 222 ordinary rounds, counting natural triggers only. The quickest is Pink Elephants 2 – Reborn at once per 154 rounds, the slowest Esqueleto Explosivo 2 – Reborn at once per 476. A bonus round in the median game paid 63x the stake, the trigger spin included.
Is buying the bonus on Thunderkick slots worth it?
Over 200 logged purchases in 4 games the average ticket returned 0.82x of its price and 71% of tickets paid less than they cost. 1 games averaged at or above the price, led by Beat the Beast: Griffin’s Gold – Reborn at 1.10x per ticket; Pink Elephants 2 – Reborn averaged 0.68x. A positive mean comes from a few large tickets, so most single purchases still lose.
Are these the RTP versions casinos use for Thunderkick games?
The declared figure next to each measurement is the RTP profile the provider's demo server reported for the tested build. Many games ship in several versions a few points apart, and a casino may run a lower one; its value is printed in the game's help screen at that casino. If it is lower than the declared figure here, the measurements on this page describe a better version than the one in front of you.