Session Report ALIN-20260729-01: One Alien Invaders Run, Checkpoints and Bonus Rounds
Below sits the checkpoint record of ALIN-20260729-01, one logged demo session of Alien Invaders: 2,798 spins at a flat 2.00 stake, the checkpoints read from the ledger, the feature rounds it produced, and the arithmetic that ties a 121.29% return to a closing balance anyone can check.
The checkpoints run through the whole session, the good stretches and the flat ones together, because a run is only evidence if all of it is on the record. The one thing held back is the per-round payout split, which did not reconcile against the ledger for this build; the report says so below and publishes the totals only.
What these numbers are, and what they are not
Session passport
The arithmetic that has to close
The publishing test does not care how the session felt: the start, minus everything staked, plus everything returned, must equal the final balance on the screen.
It closes to the cent, which is the standard every session on this site has to meet before a single number leaves it.
Balance curve, read from the ledger
The curve traces the recorded balance across the run at even intervals, plus the start and the close; it does not interpolate between readings. The dotted line marks the 100,000.00 start. The session ran between a high of 101,345.60 and a low of 99,998.00, both read from the full ledger.
Corrected 9 September 2026: the high and low above are now taken from the full ledger. The first version of this page quoted the extremes of the plotted sample, which fell short of the checkpoint table's own peak.
Checkpoint table, in full
Every logged checkpoint of the session, each read from the ledger at the listed spin. A round row shows the balance once the triggering spin's stake had left it, before the round paid; the first row shows the balance once the first stake had left it; every other row shows the balance once the listed spin had settled.
| # | Spin | Balance | Net vs start | Moment |
|---|---|---|---|---|
| 1 | 1 | 99,998.00 | −2.00 | Spin 1, after its stake |
| 2 | 1 | 99,998.00 | −2.00 | Round 1 opens |
| 3 | 65 | 100,050.60 | +50.60 | Round 2 opens |
| 4 | 116 | 100,060.00 | +60.00 | Round 3 opens |
| 5 | 127 | 101,034.90 | +1,034.90 | Round 4 opens |
| 6 | 455 | 101,038.90 | +1,038.90 | Round 5 opens |
| 7 | 655 | 100,919.10 | +919.10 | Scheduled midpoint |
| 8 | 760 | 100,792.60 | +792.60 | Round 6 opens |
| 9 | 924 | 100,786.70 | +786.70 | Round 7 opens |
| 10 | 1,247 | 100,814.00 | +814.00 | Round 8 opens |
| 11 | 1,265 | 101,118.70 | +1,118.70 | Round 9 opens |
| 12 | 1,360 | 101,169.10 | +1,169.10 | Scheduled midpoint |
| 13 | 1,538 | 101,145.40 | +1,145.40 | Round 10 opens |
| 14 | 1,635 | 101,080.10 | +1,080.10 | Round 11 opens |
| 15 | 1,684 | 101,345.60 | +1,345.60 | Session peak |
| 16 | 1,941 | 101,089.50 | +1,089.50 | Round 12 opens |
| 17 | 2,095 | 101,057.80 | +1,057.80 | Scheduled midpoint |
| 18 | 2,138 | 100,989.30 | +989.30 | Round 13 opens |
| 19 | 2,322 | 100,873.60 | +873.60 | Round 14 opens |
| 20 | 2,637 | 100,624.40 | +624.40 | Round 15 opens |
| 21 | 2,638 | 101,301.60 | +1,301.60 | Round 16 opens |
| 22 | 2,798 | 101,191.40 | +1,191.40 | Final checkpoint |
The feature rounds
All sixteen Free Spins rounds, in order, all triggered by scatters and none bought. A round's payout is the amount credited to the balance when the round closed. That credit also carries what the trigger spin won on its own cascade before the free spins began, so the table prints the two parts side by side. The credits reconcile against the session ledger, and together with the base-game wins they sum to the session's total return.
| Round | Trigger spin | Trigger spin's own win | Free spins | Free spins ×bet | Credited | Credited ×bet |
|---|---|---|---|---|---|---|
| 1 | 1 | 0.90 | 70.70 | 35.35x | 71.60 | 35.8x |
| 2 | 65 | 7.10 | 66.30 | 33.15x | 73.40 | 36.7x |
| 3 | 116 | 1.80 | 977.80 | 488.9x | 979.60 | 489.8x |
| 4 | 127 | 6.30 | 245.40 | 122.7x | 251.70 | 125.85x |
| 5 | 455 | 0.80 | 66.30 | 33.15x | 67.10 | 33.55x |
| 6 | 760 | 2.30 | 39.10 | 19.55x | 41.40 | 20.7x |
| 7 | 924 | 3.30 | 23.50 | 11.75x | 26.80 | 13.4x |
| 8 | 1,247 | 13.00 | 317.10 | 158.55x | 330.10 | 165.05x |
| 9 | 1,265 | 32.00 | 56.40 | 28.2x | 88.40 | 44.2x |
| 10 | 1,538 | 3.40 | 10.60 | 5.3x | 14.00 | 7.0x |
| 11 | 1,635 | 40.40 | 153.60 | 76.8x | 194.00 | 97.0x |
| 12 | 1,941 | 8.80 | 100.10 | 50.05x | 108.90 | 54.45x |
| 13 | 2,138 | 13.80 | 26.90 | 13.45x | 40.70 | 20.35x |
| 14 | 2,322 | 0.30 | 12.20 | 6.1x | 12.50 | 6.25x |
| 15 | 2,637 | 49.80 | 629.40 | 314.7x | 679.20 | 339.6x |
| 16 | 2,638 | 32.80 | 1.30 | 0.65x | 34.10 | 17.05x |
| 16 rounds | 216.80 | 2,796.70 | 1,398.35x | 3,013.50 | 1,506.75x | |
Round credits total 3,013.50. Base-game wins outside the rounds add 3,773.90, and 3,013.50 + 3,773.90 = 6,787.40, the session's total return that closes the invariant above.
| Measure | Value |
|---|---|
| Feature rounds triggered | 16 |
| Rounds played to a finish | 16 |
| Average spins between triggers | 174 |
| Best full round in the session | 489.8x |
| Total returned, all sources | 6,787.40 |
Every number in this table is read from the session ledger and closes against the invariant above.
How this was logged
One sitting on 29 July 2026, launched from the same in-page link the demo shelf uses. The balance was recorded continuously, a timestamped frame of the screen was kept throughout, and after the close the totals were rebuilt from the recorded spins and set against the on-screen final; the invariant section shows the result. The stake held flat at 2.00 for the whole run, so every figure here is a clean read at one bet size. The full protocol lives on the methodology page.
The spin-by-spin log behind this page is not printed here; it is retained, and it is available on request through the contact form, as is the log of any other published session: name the game and the session ID, say where the figures will appear, and link back to the report when you publish them.
Relabelled 16 September 2026: the title and the opening of this page used to say "published in full" and "complete record". They now say what the page holds, the checkpoint record and the bonus register, and where the rest is. No figure changed.
Where these numbers live
The Alien Invaders review draws on this log, alongside the sister sessions recorded elsewhere in the network. The return, the hit frequency and the trigger count above all come from the entries on this page. The build's rulebook sits on the Alien Invaders rules page.
The tables on this page are published under the CC BY 4.0 licence: reuse the numbers freely, with a link back to this report as the source.
Corrections and updates
- 17 September 2026. Round register and one label. The first version of this page printed no round-by-round payouts, because the per-round figures in our working file did not close against the ledger. They stopped one step early and missed whatever the last free spin of a round had won. The register above is rebuilt from the amounts credited to the balance, which do close, and it splits each credit into the trigger spin's own win and the free spins. The 489.8x figure is the credit of round 3, a full round, and the first version called it a single win. The return, the hit frequency and the checkpoints are unchanged.
- 18 September 2026. The rows of the checkpoint table that sit on a feature trigger are labelled as the round openings they are; the first version of this page labelled them as scheduled midpoints. The first row is labelled by what it shows, the balance once the first stake had left it. No payout or total changed.
Report an error: use the contact form and mention Session ID ALIN-20260729-01.