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Danger High Voltage — Slotester Lab test cover
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20,000 SPINS 2 RUNS DEMO SERVER

Big Time Gaming · 2019 · measured RTP 108.8% · tested 2026-09-30

Danger High Voltage

Of 915 High Voltage free spins in the first Danger High Voltage demo run, 574 had no lit Wild reel and earned 2.8% of the bonus money; RTP across both runs, 20,000 rounds, is 108.8%.

In numbers: the lab's RTP test on the official demo server measured 108.8% against 96.22% declared over 20,000 logged rounds in 2 runs; 42.2% of rounds paid; a natural bonus landed once per 183 rounds (109 in total) and a bonus round paid a median 43.6x the stake, mean 74.2x, trigger spin included; the biggest round paid 1,598.4x; the longest dry run was 20 spins.

Same series: Danger High Voltage 2, Danger! High Voltage Megapays — each tested separately

Danger High Voltage demo

United Statesavailable at Cafe Casino
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Danger High Voltage demo game field
Exclusive bonus at Cafe Casino · for players from the United States 300% up to $2,000 + 150 FS
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Free demo · no registration · plays on the provider's official server · 18+ Responsible gambling

Test card

20,000 spins · FUN 1.00 bet · every request logged
Spins20,000 · 2 runs
BetFUN 1.00
RTP declared96.22%
RTP measured108.84% (approximate 95% CI 86.2–131.5)
Hit frequency42% · every 2.37
Dead streak max / avg20 / 2.37
Median hit0.40x
Max win (no bonus round)1,598.4x · run 2, round 1419
Free spins, natural109 · 5.5 bHz · every 183.5 spins · mean bonus round payout 74.2x stake
Balance start → end5,000 → 6,768
Balance in bets, all runs in sequence
Win distribution, x bet, all runs
test logs · 2 runs · every request loggedtest record ↓
  1. 012026-09-2810,000 rounds · 0 buysfiles & checksums ↓87.05%RTP4 files · SHA-256 ↓
  2. 022026-09-3010,000 rounds · 0 buysfiles & checksums ↓130.63%RTP4 files · SHA-256 ↓

each run keeps its own spin log, CSV and raw server journal with checksums; the figures on this card combine all runs

Free spins on video

natural trigger · 109 in 20,000 spins
REC · NATURAL TRIGGER

High Voltage Free Spins at FUN 1: 15 spins and FUN 41.75. Recorded in a separate browser session, outside the statistical samples.

Across all 2 runs the 109 natural bonuses split into 21 under 20x, 39 between 20x and 50x, 25 between 50x and 100x and 24 at 100x or more, and together they made up 37% of everything the game returned. The wait between two triggers ran from 4 to 1,114 spins. Payout figures here cover the whole bonus round in ordinary stakes, the trigger spin included: its scatter pays and line wins count towards the bonus.

High Voltage Free Spins start with 15 spins, and three or more Scatters during the feature add 15 more. Four of the 57 went past 15 spins, each to 30: rounds 226 and 2088 paid 168.0x and 164.3x, rounds 4479 and 8653 only 48.1x and 40.6x.

  • triggers 109 1 per 184 spins
  • every 184 spins gaps 4 to 1,114
  • mean 74.2x bonus round median 43.6x stake
  • best 493.4x run 2 · round 5460
  • spins per bonus 16.8 15 to 30 observed
Trigger mapevery natural bonus of all runs in sequence · height = result, log scale · green = top 4
Best bonuses
  1. 01run 2 · round 546030 spins493.4x
  2. 02run 1 · round 381515 spins424.2x
  3. 03run 2 · round 759815 spins310.6x
  4. 04run 2 · round 66230 spins295.2x

Risk profile

how much bankroll the 2 runs in sequence needed
1,565xmax drawdown, in bets (run 1, by spin 9414)
-1,451xlowest point vs start
20longest dead streak, spins
Bankroll survival across the runs in sequence
50 betsbust at spin 76
100 betsbust at spin 177
200 betsbust at spin 1498

The runs are played back to back as one series, one bet size. A different session can bust earlier or never; treat this as a measured example, not a rule.

How it plays

7 rules screens from the game
RULES · FROM THE GAME
Danger High Voltage rules, page 1
Danger High Voltage rules, page 2
Danger High Voltage rules, page 3
Danger High Voltage rules, page 4
Danger High Voltage rules, page 5
Danger High Voltage rules, page 6
Danger High Voltage rules, page 7
screen 01 / 07 Danger High Voltage rules, page 1

Danger High Voltage runs on six reels of four rows, 4,096 ways counted from the leftmost reel to the right, while the Scatter pays anywhere. At FUN 1 six sugar skulls, the top symbol, pay 25.00, six bells 5.00 and six 9s 0.40.

Two Wilds fill a whole reel and appear only on reels 2 to 5: Wild Fire, a plain substitute, and Wild Electricity, which multiplies every win it takes part in by 6, so two of them in one win mean x36. Neither replaces the Scatter.

Scatters pay in any position, 6, 20, 50 or 100 times the stake for three to six of them, and three or more open a choice between two features played at the triggering stake. High Voltage Free Spins give 15 spins in which a High Voltage Wild on any of the middle four reels lights one multiplier from x11 to x66 for the wins it touches, and three more Scatters add another 15. Gates of Hell Free Spins give 7 spins in which one symbol becomes a Sticky Wild on reels 2 to 5, and every reel filled with four of them adds 3 spins.

The build tested here declares 96.22% RTP and lists a 28,190x ceiling in its client configuration; stakes run from FUN 0.20 to FUN 20, and there is no bonus purchase. Every feature in this series was played as High Voltage Free Spins, so Gates of Hell has no measurements here.

Mechanics7 from the rules screens
  • Wild symbol
  • Expanding symbol
  • Multiplier
  • Scatter symbol
  • Free spins
  • Retrigger
  • Sticky symbol

Verdict

Three lit reels, one spin

At FUN 1 a spin, Danger High Voltage returned 87.05% and 130.63% in its two runs, 108.84% pooled over 20,000 spins and 1,768 bets ahead, against the declared 96.22%; something paid on 42.09% and 42.32% of spins with a 0.4x median hit in both, and no dry stretch passed 20. The second run's surplus sat in three base spins: round 1419 lit three Wild Electricity reels for a x216 line multiplier and 1,598.4x, round 108 lit three for 658.8x and round 1564 two for 900x, where the first run's best base spin was 61.2x.

High Voltage Free Spins came 109 times, one per 183.5 spins or 5.45 on the bHz scale of features per thousand spins; with their trigger spins the features averaged 74.16x the stake, 43.55x at the median, 37.1% of everything returned; 24 cleared 100x, 21 stayed under 20x, and 13 retriggered to 30 spins, four in run one and nine in run two. The lit multiplier ruled both runs: 574 and then 576 unlit spins paid 2.8% of the free spins money each time, x33 and x44 took 62.6% in run one, x22 and x44 57.3% in run two, and x66 lit 18 and then 8 times; the largest feature moved from 424.2x on round 3815 to 493.4x on round 5460, and the longest waits were 903 and 1,113 spins.

Wild Electricity reels appeared on 7.53% and 7.87% of base spins and returned 54.0% and 74.8% of the base-game money, 3.81x and 8.65x a spin, while spins with no Wild reel at all averaged 0.19x and 0.18x. With no buy button on this build the balance follows the reels: run one bottomed 1,450.8 bets down on spin 9414 and closed 1,295.2 down, run two never fell more than 48.1 bets below its start and closed 3,062.8 up with all three test bankrolls intact, and the pooled ledger's deepest point remains run one's.

Measured upsides
  • Seven base spins over 100x in run two, topped by 1,598.4x from three Wild Electricity reels on round 1419
  • Free spins every 183.5 spins on average, 109 in 20,000, with 13 retriggers to 30 spins
  • Both runs paid on 42% of spins, with no dry stretch past 20
  • Run two never fell below 48.1 bets down and every test bankroll survived it
Measured downsides
  • Run one returned 87.05% and bottomed 1,450.8 bets down on spin 9414
  • Unlit free spins, 1,150 of 1,830, paid 2.8% of the free spins money in each run
  • A feature paid under 20x 21 times in 109, the least 6.35x on round 5514 of run one
  • Gates of Hell free spins remain untested: all 109 features were played as High Voltage
Verdict by run · 2 runs · tap a run to read it
Run 01·2026-09-28·87.05% Of the 10,000 FUN 1 spins, 42.09% paid something, with a median hit of 0.4x the stake.

Of the 10,000 FUN 1 spins, 42.09% paid something, with a median hit of 0.4x the stake. The total reached 87.05% against the declared 96.22%, and a 424.2x feature at round 3815 was the largest single round.

Spins that showed a Wild Electricity reel were 7.53% of the series and returned 54.0% of base money, 3.81x on average, while Wild Fire spins without it, 24% of the series, paid 22.0%, and the 68.47% of spins with no Wild reel returned 24.0%. No base spin went past 61.2x.

High Voltage Free Spins came 57 times, once per 175.4 spins, paying 66.26x the stake on average and 40.6x at the median, trigger spins included; four of them retriggered to 30 spins. Inside them, the lit multiplier sets the result: 574 of 915 spins had no High Voltage Wild and paid 2.8% of the free spins money, spins at x33 and x44 paid 62.6% between them, and in the record feature the 14th spin alone brought 330.0 of its 424.2.

Run 02·2026-09-30·130.63% Three Wild Electricity reels lit together on round 1419, x6 three times over for a x216 line multiplier, and four line wins came to 1,598.4x the stake, the largest base-game spin on this page by a factor of 26; round 108 did the same for 658.8x, and round 1564 lit two reels for a single x36 line worth 900x.

Three Wild Electricity reels lit together on round 1419, x6 three times over for a x216 line multiplier, and four line wins came to 1,598.4x the stake, the largest base-game spin on this page by a factor of 26; round 108 did the same for 658.8x, and round 1564 lit two reels for a single x36 line worth 900x. Spins with a Wild Electricity reel were 7.87% of the series and returned 74.8% of base-game money, 8.65x on average, while Wild Fire spins without one, 23.17% of the series, paid 11.8% and the 68.96% with no Wild reel 13.4%; seven scatter-free spins passed 100x where the first run had none above 61.2x.

Fifty-two High Voltage features came once per 192.3 spins, played 915 free spins and, trigger spins included, paid 82.82x the stake on average, 43.88x at the median, 33.0% of the return; nine of the 52 retriggered to 30 spins against four in the first run, and fourteen cleared 100x, led by round 5460, a 30-spin feature worth 493.4x whose fifth spin paid 264.0 and 26th 165.0. Inside the features the lit multiplier still decided the money: 576 spins with no High Voltage Wild paid 2.8% of the free spins money, x22 and x44 took 29.0% and 28.3% between them, x66 lit eight times for 3.1%, and the weakest feature, round 6172, paid 6.9x; the longest wait ran 1,113 spins after round 8284.

Something paid on 42.32% of spins, the median hit 0.4x, 5,768 spins returned nothing, and no dry stretch passed 15 spins. The balance fell 48.1 bets below its start on spin 107, crossed above it on spin 108 and never came back, peaking 3,907 bets up on spin 1918 after a first 2,000-spin block of 293.2% and closing at FUN 8,062.75, 3,062.8 bets ahead, 130.63% of the FUN 10,000 staked; the other four blocks returned 92.7%, 91.8%, 84.4% and 91.0%, and every test bankroll, 50, 100 and 200 bets, survived the full 10,000 spins.

Test record

2 runs · 20,000 rounds · 0 buys · open data · closed rig

This game has been through 2 separate test runs on the official demo server, each a fresh session of 10,000 rounds at a fixed bet. Every figure on this page combines the runs into one sample, as if they were one long session; the record below keeps each run apart, with its own numbers and its own downloadable log.

combined result · all runs2026-09-28 → 2026-09-30
Measured return 108.84% 95% band 86.2–131.5% · declared 96.22%
  • 20,000rounds, all runs
  • 42%rounds that paid
  • 1,598xbiggest round
  • 1 / 183natural bonus rate
  • 20longest dry streak
return by run, and combineddeclared 96.22%
Run 1 · 2026-09-2810,000 rounds
87.05%95% band 71.6–102.5%
Run 2 · 2026-09-3010,000 rounds
130.63%95% band 88.1–173.2%
All runs20,000 rounds combined
108.84%95% band 86.2–131.5%
65%85%105%125%145%165%declared 96.22%
dot = return of the run · whisker = approximate 95% band for that sample's mean · more rounds usually narrow a band, one very large round can widen it
how the return settled, round by round20,000 rounds
108.84% after 20,000 roundsdeclared 96.22%run 2 starts at round 10,001
line = return measured up to that round, all runs in sequence · dashed vertical = a new run starts · the line swings early and calms as rounds pile up
Each run on its own · tap a run to open it
01run Run 012026-09-28 10,000 rounds at FUN 1.00 · 0 buys · rig 0.8.3 · RTP profile 96.22% measured return87.05%-9.2 pts vs declared 95% band71.6–102.5% natural bonuses57 · 1 / 175 biggest round424x
95% band
71.6–102.5%
rounds that paid
42%
biggest round
424x · round 3,815
longest dry streak
20
natural bonuses
57 · one per 175 rounds
balance start → end
5,000 → 3,705
deepest drawdown
1,565x
Download this run · the square button copies the file’s SHA-256, so you can confirm the download is unchanged
02run Run 022026-09-30 lab note 10,000 rounds at FUN 1.00 · 0 buys · rig 0.8.7 · RTP profile 96.22% measured return130.63%+34.4 pts vs declared 95% band88.1–173.2% natural bonuses52 · 1 / 192 biggest round1,598x
95% band
88.1–173.2%
rounds that paid
42%
biggest round
1,598x · round 1,419
longest dry streak
15
natural bonuses
52 · one per 192 rounds
balance start → end
5,000 → 8,063
deepest drawdown
1,164x
lab note · 2026-09-30

Run two's date is 30 September and its number 130.63%, against 87.05% on 28 September; 108.84% pooled over 20,000 FUN 1 spins against the declared 96.22%. The gain sat in the base game: three rounds with two or three Wild Electricity reels paid 1,598.4x, 900x and 658.8x against a 61.2x best in the first run; the free spins came 52 times against 57 and averaged 82.82x against 66.26x, trigger spins included, with nine retriggers against four.

Download this run · the square button copies the file’s SHA-256, so you can confirm the download is unchanged

2 test runs combined into one sample (2026-09-28, 2026-09-30): 20000 ordinary paid rounds, including naturally triggered features, at a fixed FUN 1.0 bet on the Big Time Gaming demo served by the Relax Gaming platform (jurisdiction MT, RTP profile 96.22%); every request and response logged.

The test rig plays the official demo build over the network and records every server round: bet, win, intermediate steps (cascades, respins), free spins, collect. Screenshots and video were captured in a separate browser session and are not part of the statistical samples. The text was read against the log by an editor before publication. How we test → One test, step by step →

CLOSED RIG OPEN DATA

FAQ

6 questions · answered from the log
Should 87.05% and then 130.63% be read as different Danger High Voltage builds?
Lab answer

No: both runs came from the same FUN 1 demo, and the pooled 108.84% over 20,000 spins is the better summary than either. The 43-point swing sits in three base spins of run two with two or three Wild Electricity reels lit, 1,598.4x, 900x and 658.8x, where the first run's best base spin was 61.2x; the 109 High Voltage features brought 43.4% and then 33.0% of everything paid out.

What does Wild Electricity do?
Lab answer

It fills one of reels 2 to 5 and multiplies every win it substitutes in by 6, or by 36 with two of them and 216 with three. It showed on 753 and then 787 of 10,000 base spins, and a spin with it averaged 3.81x in run one and 8.65x in run two against 0.49x and 0.46x for a spin whose only Wild reel was Wild Fire; round 1419 of run two had all three lit.

Were Gates of Hell free spins tested at all?
Lab answer

No: all 109 features across two runs were played as High Voltage Free Spins, 15 spins with a High Voltage Wild worth x11 to x66. Gates of Hell, 7 spins with a Sticky Wild, was never chosen, so the page still has no figures for it.

Are High Voltage Free Spins evenly spaced?
Lab answer

No. One hundred and nine features came in 20,000 spins, 5.45 per 1,000 or one per 183.5 spins on average, 57 in the first run and 52 in the second, but the gaps were uneven, with the longest at 903 spins after round 5694 of run one and 1,113 after round 8284 of run two.

Was x66 ever lit during the free spins?
Lab answer

Yes, on 18 of 915 free spins in run one, 8.8% of the free spins money, and on 8 of 915 in run two, 3.1%. The busiest levels were x33 and x44 in run one, 62.6% between them, and x22 and x44 in run two, 57.3%.

How big can a Danger High Voltage win get?
Lab answer

The client configuration caps it at 28,190x the stake. The closest so far is 1,598.4x on round 1419 of run two, a base spin; 31 rounds passed 100x across the two runs, 21 of them in run two, and the largest feature paid 493.4x on round 5460.

Comments and reviews

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Slotester Labmeasured run · every request logged measured
  • spins20,000
  • bet1.00
  • result+1,768x
  • RTP measured108.8%
  • bonuses109
  • max win, no bonus1,598.4x

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