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Bonanza — Slotester Lab test cover
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10,000 SPINS DEMO SERVER

Big Time Gaming · 2019 · tested 2026-09-28

Bonanza

One free spins feature decided this Bonanza review: 1,626.45x at round 2128 lifted the demo series to 109.31% RTP, one spin after the balance had sunk 561 bets below its start.

Test card

10,000 spins · FUN 1.00 bet · every request logged
Spins10,000
BetFUN 1.00
RTP declared96.00%
RTP measured109.31% (approximate 95% CI 75.4–143.2)
Hit frequency39% · every 2.58
Dead streak max / avg22 / 2.61
Median hit0.90x
Max win (base game)202.4x · spin 7994
Free spins, natural20 · 2.0 bHz · every 500 spins · mean FS-only payout 150.5x stake
Balance start → end5,000 → 5,931
Balance in bets over the base series
Win distribution, x bet
test logs · 1 run · every request loggedtest record ↓
  1. 012026-09-2810,000 rounds · 0 buysfiles & checksums ↓109.31%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

Play Bonanza demo

BIG TIME GAMING · official demo · same math as real play
Best offer for players from United States Bonanza available at Cafe Casino
Play for real money
Bonanza demo game field
Exclusive bonus at Cafe Casino · for players from the United States 300% up to $2,000 + 150 FS
Get bonus
Free demo · no registration · plays on the provider's official server · 18+ Responsible gambling

Free spins on video

natural trigger · 20 in 10,000 spins
REC · NATURAL TRIGGER

Separate media session at FUN 1: natural free spins on media spin 25, 12 spins reaching x8 and FUN 42.20. Recorded in a separate browser session, outside the statistical samples.

Across the whole run the 20 natural bonuses split into 5 under 20x, 6 between 20x and 50x, 4 between 50x and 100x and 5 at 100x or more, and together they made up 28% of everything the game returned. The wait between two triggers ran from 11 to 1,759 spins. Payout figures here are FS-only, in ordinary stakes; the trigger payout is excluded.

Bonanza opens its feature with 12 free spins, and Scatters landing in the carts during the feature add 5 or 10 more. The share shown counts features that ran past 12 spins; here that happened once, when round 6732 collected 5 extra spins and finished 17 spins long with 178.5x the stake.

  • triggers 20 1 per 500 spins
  • every 500 spins gaps 11 to 1,759
  • mean 150.5x FS-only median 44.6x stake
  • best 1,626.5x round 2128
  • spins per bonus 12.2 12 to 17 observed
Trigger mapevery natural bonus of the run · height = result, log scale · amber = top 4
Best bonuses
  1. 01round 212812 spins1,626.5x
  2. 02round 637212 spins355.3x
  3. 03round 673217 spins178.5x
  4. 04round 632212 spins167.9x

Risk profile

how much bankroll this run needed
593xmax drawdown, in bets (by spin 2127)
-561xlowest point vs start
22longest dead streak, spins
Bankroll survival in this run
50 betsbust at spin 270
100 betsbust at spin 335
200 betsbust at spin 715

One run, one bet size. A different session can bust earlier or never; treat this as a measured example, not a rule.

How it plays

6 rules screens from the game
RULES · FROM THE GAME
Bonanza rules, page 1
Bonanza rules, page 2
Bonanza rules, page 3
Bonanza rules, page 4
Bonanza rules, page 5
Bonanza rules, page 6
screen 01 / 06 Bonanza rules, page 1

Bonanza is a Megaways slot with six reels of up to seven symbols each and a row of mine carts over reels 2 to 5 that adds one more symbol to each of those reels, for up to 117,649 ways. Wins pay left to right on adjacent reels, starting with the first reel, and at FUN 1 six purple gems pay 50 while six 9s pay 0.80.

Every winning symbol takes part in a reaction: it is removed, and new symbols drop in from above on the reels and slide in from the right in the carts. The dynamite Wild arrives only in the carts and replaces every symbol except the Scatter, and the reactions keep going as long as new wins form.

The GOLD letters are the Scatters: four of them award 12 free spins, and every Scatter beyond four is worth five spins apiece. Inside the feature the win multiplier opens at x1 and climbs one step after each reaction, without a cap, while Scatters that arrive in the carts add 5 spins for three and 10 for four.

The game states 96.00% RTP on this demo server, demo stakes run from FUN 0.20 to FUN 100, and there is no bonus purchase: every feature in the sample came from ordinary spins.

Mechanics7 from the rules screens
  • Megaways
  • Cascading reels
  • Wild symbol
  • Scatter symbol
  • Free spins
  • Multiplier
  • Retrigger
Paytable
x total bet · bar = top payout on a log scale
symbol 23456
Purple gem 2x 5x 10x 25x 50x
Red gem — 1x 2x 2.5x 7.5x
Blue gem — 0.25x 1x 1.5x 2x
Green gem — 0.25x 0.5x 0.75x 2x
A — 0.2x 0.4x 0.6x 1.75x
K — 0.2x 0.4x 0.6x 1.75x
Q — 0.2x 0.25x 0.6x 1x
J — 0.15x 0.25x 0.5x 1x
10 — 0.15x 0.25x 0.5x 0.9x
9 — 0.1x 0.2x 0.4x 0.8x

Bet range FUN 0.20 – 100 per spin · payouts read from the game's paytable at bet FUN 1.00

Verdict

The ladder pays at the top

The return settled at 109.31% after 10,000 spins at FUN 1, far above the declared 96.00%; the approximate 95% CI, 75.38% to 143.24%, is wide because one round carried so much of the return. Round 2128 paid 1,626.45x on its own; without it the remaining rounds come to 93.05%. The balance had reached its lowest point, 561 bets down, on round 2127, one spin earlier.

Money in the feature follows the multiplier ladder. Across 20 natural features and 245 free spins, the 22 spins that began at x10 or higher collected 57.7% of the feature money, spins from x5 upward 89.2%, and the 40 spins played at x1 only 2.0%. In the record feature the 11th spin started at x15 and paid 1,474.80 FUN, 90.7% of that bonus.

Ordinary spins in between are steadier: 38.74% of spins paid, one in 2.58, and the longest dry run lasted 22 spins. Single reactions made 47.2% of base-game money and chains of two or three wins another 41.8%, while the best base hit reached 202.35x at round 7994. Features were the rare part, 20 of them at one per 500 spins, with 1,758 spins between rounds 7576 and 9335 and a median of 44.63x.

Measured upsides
  • Free spins that began at x10 or more paid 57.7% of all feature money.
  • The best feature, at round 2128, paid 1,626.45x the stake.
  • Base spins paid 38.74% of the time, and the longest dry run lasted 22 spins.
  • Measured return reached 109.31%, above the declared 96.00%.
Measured downsides
  • Without its single best round the series returned 93.05%.
  • Free spins landed once per 500 spins, with one gap of 1,758 spins.
  • The median feature paid 44.63x the stake, and four of the 20 paid less than 16x.
  • No purchase route exists, so the multiplier ladder has to come from ordinary spins.

Test record

10,000 rounds · 0 buys · open data · closed rig

One test run so far: a single session of the base game on the official demo server, every request and response logged; the game offers no bonus purchase, so every feature in the sample came from ordinary spins. When the game is tested again, the new run is added here and the figures on this page combine all runs into one sample.

result of this run2026-09-28
Measured return 109.31% 95% band 75.4–143.2% · declared 96.00%
  • 10,000rounds logged
  • 39%rounds that paid
  • 1,626xbiggest round
  • 1 / 500natural bonus rate
  • 22longest dry streak
return of this run with its 95% banddeclared 96.00%
Run 1 · 2026-09-2810,000 rounds
109.31%95% band 75.4–143.2%
70%90%110%130%150%declared 96.00%
dot = measured return · whisker = the range the long-run value is likely to sit in, given this many rounds
how the return settled, round by round10,000 rounds
109.31% after 10,000 roundsdeclared 96.00%
line = return measured up to that round · the line swings early and calms as rounds pile up
The run · tap to open
01run

Run 012026-09-28

10,000 rounds at FUN 1.00 · 0 buys · rig 0.8.2 · RTP profile 96.00%

measured return109.31%+13.3 pts vs declared
95% band75.4–143.2%
natural bonuses20 · 1 / 500
biggest round1,626x
95% band
75.4–143.2%
rounds that paid
39%
biggest round
1,626x · round 2,128
longest dry streak
22
natural bonuses
20 · one per 500 rounds
balance start → end
5,000 → 5,931
deepest drawdown
593x
Download this run · the square button copies the file’s SHA-256, so you can confirm the download is unchanged

10000 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 96.0%); every request and response logged; test run 2026-09-28.

The test rig plays the official demo build over the network and records every server round: bet, win, cascade steps, 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 →

CLOSED RIG OPEN DATA

FAQ

7 questions · answered from the log
Did Bonanza really return 109.31% in the demo?
Lab answer

Yes, across 10,000 FUN 1 spins, though the approximate 95% CI of 75.38% to 143.24% is wide, and one round explains the gap: the 1,626.45x feature at round 2128. Without it the other rounds returned 93.05%, below the declared 96.00%.

On average, how long does Bonanza take to trigger free spins?
Lab answer

Four GOLD Scatters landed together 20 times across the series, one trigger per 500 spins on average. The longest wait was 1,758 spins, between rounds 7576 and 9335.

Unlimited win multiplier: how high did it climb?
Lab answer

The multiplier begins at x1 when the free spins start and goes up by one after every reaction. Across the 20 features the multiplier in play on the final spin averaged 8.95, and the highest reached x19 in round 2128.

In the feature, which spins paid the most?
Lab answer

The late ones. Spins that began at x10 or higher were 22 of 245 but collected 57.7% of the feature money, while the 40 spins at x1 made 2.0%.

Can the Bonanza bonus be bought?
Lab answer

No purchase option exists in this demo, so the 12 free spins start only from four GOLD Scatters, which the series produced 20 times.

Largest hit without free spins: how big was it?
Lab answer

The best base-game round paid 202.35x at round 7994. Chains of four or five winning reactions were 0.84% of spins and paid 9.5% of base-game money.

Mine carts above the reels: what are they for?
Lab answer

The carts sit above reels 2 to 5, add one symbol to each of those reels and bring the dynamite Wild and the in-feature Scatters. With them a spin can reach 117,649 ways.

Field notes

0 notes
Slotester Labmeasured run · every request logged measured
  • spins10,000
  • bet1.00
  • result+931x
  • RTP measured109.3%
  • bonuses20
  • max win202.4x

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