193 million spins on moon princess: a 12-point RTP ladder, and the floor version added up to 25 points to the bust rate
exp · 053 · 2026-06-27 · simulation-based
last updated 2026-06-27
Run it yourself in the live simulator. All figures are simulation-based observations, not predictions. See our methodology.
what we measured
| parameter | value |
|---|---|
| provider / engine | Play'n GO · 5×5 grid-clear, cascading wins, girl-power features |
| configs simulated | 96.50% (provider default) · 84.50% (published floor of the ladder) |
| published rtp ladder | 96.50% / 94.51% / 91.49% / 87.50% / 84.50%, a verified 12.00pp spread |
| volatility | very high (10/10) |
| stakes | $0.20 / $0.50 / $1.00 per spin |
| bankrolls | $50 / $100 / $200 |
| sessions | 10,000 per stake/bankroll cell, 90,000 per version |
| spin cap | 2,000 spins per session |
| max win | 5,000x stake (a feature event) |
model inputs worth flagging: the five-step RTP ladder and the 5,000x max are sourced. but Play'n GO does not publish a hit frequency or a bonus trigger rate for moon princess, so we modelled both (about 30% hit, about one feature every ~130 spins) as documented assumptions; the bonus payout distribution and base-versus-feature split are model assumptions calibrated to the published RTP and the 5,000x cap. the cross-version comparison below holds every one of those inputs constant, so the deltas are robust even though the absolute bonus-wait and bonus-value figures are estimates.
how long bankrolls survived
the stake sets the clock. at the $100 bankroll the default-version median ran 849 spins at $0.50, longer than most of our library, because the grid-clear cascades return small amounts often. but the destination is the same: $0.50 against $50 busted 86.1% of the time even on the default version.
bust rates
bust rates within the 2,000-spin cap, 96.50% default version, 95% confidence intervals:
| $50 bankroll | $100 | $200 | |
|---|---|---|---|
| $0.20/spin | 63.7% ±0.9 | 27.8% ±0.9 | 0.3% ±0.1 |
| $0.50/spin | 86.1% ±0.7 | 71.5% ±0.9 | 39.9% ±1.0 |
| $1.00/spin | 93.7% ±0.5 | 86.4% ±0.7 | 70.9% ±0.9 |
plain reading: hold the bankroll at $100 and move the stake from $0.20 to $0.50, and the bust rate jumps from 27.8% to 71.5%. the only genuinely safe cell is $0.20 against $200 (0.3%).
the bonus wait, and what it pays
on our modelled trigger rate (about 1 in 130 spins, an assumption), the feature is where roughly half the total return is concentrated. the payout side (model-based estimates): the average feature paid 63x stake but the median was just 34x, and 63% paid under 50x. the 5,000x ceiling is the rare tail; a typical feature pays well under the average.
what a finished session looks like
the final-bankroll distribution at $0.50/$100 has almost no middle. seven sessions in ten ended with $0.49 or less of the original $100, busted, in effect, with the median finish near $0.43. then it leaps: the 90th percentile kept $316. even the gentlest-looking grid game lands in the same die-or-detonate shape.
the rtp version lottery
this is the study's reason to exist, and moon princess has the widest spread we have ever measured: a published ladder from 96.50% all the way down to 84.50%, a 12.00-point gap, and the casino chooses the rung. we ran the full grid at the default and the floor; same model, same inputs, only the RTP changed:
| cell | 96.50% default | 84.50% floor | delta |
|---|---|---|---|
| $0.20/$100 bust | 27.8% ±0.9 | 51.9% ±1.0 | +24.1pp |
| $0.50/$100 bust | 71.5% ±0.9 | 86.1% ±0.7 | +14.6pp |
| $0.50/$200 bust | 39.9% ±1.0 | 64.5% ±0.9 | +24.6pp |
| $1.00/$200 bust | 70.9% ±0.9 | 86.1% ±0.7 | +15.2pp |
the floor version raised the bust rate by 15 to 25 points depending on the cell, the largest version effect in our entire library, because the spread is a full twelve points, six times wider than a typical Pragmatic ladder. same game, same princesses. the only difference is the RTP the operator chose to run, and at the floor the safest-looking cells more than double their bust rate. the version is the one variable a player can actually pick, so play it where the published RTP is highest. our casino hub ranks operators by exactly that.
methodology note
we simulate models calibrated to published math, RTP, hit frequency, volatility profile, bonus behaviour, not the provider's game engine. results are sample-based observations from 192,735,209 simulated spins (180,000 sessions across two RTP versions), with 95% confidence intervals shown. hit frequency and bonus trigger rate are not published for this game and were modelled as documented assumptions; the bonus payout distribution and base-versus-feature split are modelled. the base-game ceiling (200x) is a reasoned estimate; the 5,000x max is a feature event. casino-by-casino RTP figures are the published ladder, not statements about any operator's current configuration. model validation: moon-princess v1, analytic calibration exact at 96.50% and 84.50%, 10M-spin checks within tolerance. slots are negative-expectation games; nothing here predicts outcomes or improves odds. corrections policy: methodology.html.
Where the max win actually comes from
50% of this game's RTP is locked inside the bonus you rarely trigger; the base game on its own returns just 48%.
A normal spin in our simulation never returned more than ~200x (€100). The 5,000x top win is a feature event, it only came out of the bonus. (base-game ceiling: model estimate)
Play the Moon Princess demo, or stress-test it
Looking for the Moon Princess demo or free play? A demo shows you a handful of spins. Our free simulator runs Moon Princess across thousands of sessions and shows what actually happens to a bankroll over time: the bust rate, how long the money lasts, and the wait for the bonus. It is the demo with the math switched on.
stress-test Moon Princess free
Where Moon Princess runs at the top version
Rainbet was sighted running the 96.50% version of Moon Princess, the highest published, in our 2026-07-03 version scan. A sighting is a dated observation, not a guarantee: versions move, so check the RTP in the game’s info panel on the day you play. A higher version returns more of what you stake on average; the game stays negative-expectation either way.
read our Rainbet review visit Rainbet
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FAQ
What is the real RTP of Moon Princess?
The default published RTP we modelled is 96.50%. It also ships in lower published versions (ladder: 96.50%, 94.51%, 91.49%, 87.50%, 84.50%), and the casino, not the game, picks which one runs; check the RTP in the game's info panel.
Is Moon Princess a tight slot? How many sessions bust?
In our simulation at the default RTP, 71.5% of $0.50-a-spin sessions on a $100 bankroll busted before the 2,000-spin cap. That is a measured session cost across thousands of simulated sessions, not a prediction for your next one.
How often does the Moon Princess bonus hit?
About once every 130 spins on average in our simulation, roughly 26 minutes at five spins a minute. Real gaps vary widely around that average, and a bonus is never "due".
Is there a Moon Princess demo or free play?
Yes. You can play Moon Princess in demo mode at most casinos, and you can stress-test it free in our simulator, which runs thousands of sessions and reports the bust rate and session length, the demo with the math switched on.
Is Moon Princess worth playing?
It is negative-expectation like every slot. In our simulation, 71.5% of $0.50/$100 sessions busted before the 2,000-spin cap. We report the cost; we never tell you to play.
Which casino has the highest RTP for Moon Princess?
In our 2026-07-03 version scan, Rainbet was sighted running the highest published version (96.50%) of Moon Princess. A sighting is a dated observation, not a guarantee; check the game's info panel on the day you play.
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