The dataset viewer is not available for this split.
Error code: StreamingRowsError
Exception: ValueError
Message: Expected object or value
Traceback: Traceback (most recent call last):
File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 290, in _generate_tables
pa_table = paj.read_json(
io.BytesIO(batch), read_options=paj.ReadOptions(block_size=block_size)
)
File "pyarrow/_json.pyx", line 342, in pyarrow._json.read_json
File "pyarrow/error.pxi", line 155, in pyarrow.lib.pyarrow_internal_check_status
File "pyarrow/error.pxi", line 92, in pyarrow.lib.check_status
raise convert_status(status)
pyarrow.lib.ArrowInvalid: JSON parse error: Column() changed from object to string in row 0
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/src/services/worker/src/worker/utils.py", line 149, in get_rows_or_raise
return get_rows(
dataset=dataset,
...<4 lines>...
column_names=column_names,
)
File "/src/libs/libcommon/src/libcommon/utils.py", line 272, in decorator
return func(*args, **kwargs)
File "/src/services/worker/src/worker/utils.py", line 129, in get_rows
rows_plus_one = list(itertools.islice(safe_iter(ds, dataset=dataset), rows_max_number + 1))
File "/src/services/worker/src/worker/utils.py", line 489, in safe_iter
yield from ds.decode(False) if ds.features else ds
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2818, in __iter__
for key, example in ex_iterable:
^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2355, in __iter__
for key, pa_table in self._iter_arrow():
~~~~~~~~~~~~~~~~^^
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2380, in _iter_arrow
for key, pa_table in self.ex_iterable._iter_arrow():
~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 536, in _iter_arrow
for key, pa_table in iterator:
^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 419, in _iter_arrow
for key, pa_table in self.generate_tables_fn(**gen_kwags):
~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 304, in _generate_tables
batch = json_encode_fields_in_json_lines(original_batch, json_field_paths)
File "/usr/local/lib/python3.14/site-packages/datasets/utils/json.py", line 111, in json_encode_fields_in_json_lines
examples = [ujson_loads(line) for line in original_batch.splitlines()]
~~~~~~~~~~~^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/utils/json.py", line 20, in ujson_loads
return pd.io.json.ujson_loads(*args, **kwargs)
~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
ValueError: Expected object or valueNeed help to make the dataset viewer work? Make sure to review how to configure the dataset viewer, and open a discussion for direct support.
YAML Metadata Warning:empty or missing yaml metadata in repo card
Check out the documentation for more information.
Slots with multiple certified RTP versions (2026)
Every game in the ToolsGambling RTP registry whose provider publishes more than one certified RTP version for the same title. 730 games from 3,761 with a confirmed RTP, across 15 studios.
The point of this release is not the count. It is that every row can be checked against the provider's own page as it looked when we read it. Each row carries the sha256 of the raw HTTP response and a link to a public receipt for that snapshot.
- Version:
1.0.4· frozen2026-08-11 - License: CC BY 4.0 — attribution required
- Attribution:
ToolsGambling — https://toolsgambling.com/rtp - Files:
rtp-variants-2026.csv,rtp-variants-2026.json
Why this exists
A slot does not have "an RTP". Many slots ship as a set of certified builds — the same game at 96%, 94%, 91%, 87%, 84% — and the operator chooses which build to deploy. The player sees one number in the game info panel and has no way to know which build they were served.
Trade press covered this in 2026 without publishing a single figure or a single link to data. This dataset is the figures, with the sources attached.
What is in it
| Column | Meaning |
|---|---|
canonical_slug |
Stable identifier used across the registry |
canonical_name |
Game title as published by the provider |
provider / provider_display |
Studio |
game_type |
slot · table · instant · bingo · keno |
variants_count |
How many certified versions the provider publishes |
rtp_min / rtp_max |
Lowest and highest published version |
spread_pp |
rtp_max − rtp_min, in percentage points |
rtp_variants |
All published versions, pipe-separated, ascending |
headline_rtp |
The version we display as the headline — see caveat below |
last_verified |
When the source page was last read |
source_url |
The provider page the values come from |
snapshot_sha256 |
sha256 of the raw HTTP response body |
evidence_url |
Public receipt for that snapshot |
How to check any row
curl https://toolsgambling.com/api/evidence/<snapshot_sha256>
The receipt returns the source URL, fetch time, HTTP status, byte length, the hash of the normalised content and a safe text excerpt. Raw HTML is never served: it carries third party scripts, trackers and someone else's copyright. Method: https://toolsgambling.com/rtp/methodology
Headline numbers
| Games with a confirmed RTP | 3,761 |
| Of those, published in several versions | 730 (19.4%) |
| Studios covered | 15 |
| Studios publishing multiple versions | 5 |
| Worst available version below 94% | 676 |
| Worst available version below 90% | 434 |
By studio — read this, not a single average.
| Studio | With RTP | Multi-version | Share | Mean spread | Median spread |
|---|---|---|---|---|---|
| Play'n GO | 387 | 373 | 96.4% | 11.97 pp | 12.00 pp |
| Yggdrasil | 306 | 279 | 91.2% | 5.06 pp | 5.50 pp |
| Push Gaming | 39 | 39 | 100% | 2.12 pp | 2.05 pp |
| Hacksaw Gaming | 34 | 34 | 100% | 8.41 pp | 8.11 pp |
| Endorphina | 228 | 5 | 2.2% | 0.63 pp | 0.22 pp |
| BGaming, Microgaming, NetEnt, Nolimit City, Pragmatic Play, Red Tiger, Skywind, Stakelogic, Thunderkick, Wazdan | 2,767 | 0 | 0% | — | — |
⚠️ Do not quote the pooled median spread (11.63 pp) on its own. Play'n GO alone accounts for 51.1% of every multi-version game in the set, so a pooled figure describes one studio's product policy, not an industry norm. Ten of the fifteen studios publish a single RTP for every title.
Play'n GO publishes named tiers. Their CMS exposes fields rtp84, rtp87, rtp91,
rtp94, rtp96 with labels such as "RTP - 84", plus defaultRtp. The most common ladder,
84.2 / 87.2 / 91.2 / 94.2 / 96.2, appears on 116 games. For all 373 of their
multi-version games, defaultRtp equals the highest tier — the advertised number is the
best case, and every lower tier is a build an operator may deploy instead.
Limits — what this dataset does not tell you
- It does not say which version a given casino runs. Operators do not publish that. Measured: 0 of 13 pages in a LeoVegas probe, 0 RTP in the 888 (199 games) and Betway (580 games) lobbies that allow us in, 0 of 13 sources revealed anything under browser rendering. Behind the 403s sits the same thing the open sources show.
- Absence of a game here is not evidence of a single RTP. It can mean the provider
publishes nothing. Yggdrasil leaves
game_rtpempty for 250 of 557 titles (44.9%) in their own WordPress API — non-publication, not a parsing failure. headline_rtpis our display convention, not a provider statement. It is the highest published version. Where the provider states a default of its own (Play'n GO'sdefaultRtp), the two agree in 373 of 373 cases — but the column itself is ours.- Variants come from one winning source per game. Where several sources describe the same title, the registry picks one by confidence, then provider priority, then recency; versions are not merged across sources.
- One receipt can back several games. 730 games rest on 454 distinct snapshots, because a Play'n GO page embeds a CMS layer covering more than one title. The receipt proves the document, and the document contains the record.
- Snapshot dates are May–July 2026. A provider may have changed a page since.
Provenance and corrections
Values are parsed from the studios' own public pages, and each parse is tied to a stored snapshot. When we find our own parsing wrong, we correct it and say so: on 2026-08-11, 20 Play'n GO records were found to carry tiers spliced from a neighbouring game's CMS record and were corrected — for example BlackJack MH, which publishes a single 99.54%, had four lower tiers attached to it that Play'n GO never published for that game. Three titles turned out to publish no RTP at all and were removed rather than filled in.
Citation
Published on Zenodo, 10.5281/zenodo.21893613 (this version, 1.0.4) and 10.5281/zenodo.21893612 (concept DOI, always the latest version).
ToolsGambling (2026). Slots with multiple certified RTP versions (2026) (Version 1.0.4) [Data set]. Zenodo. https://doi.org/10.5281/zenodo.21893613
Machine-readable metadata is in CITATION.cff. Mirror on Hugging Face:
https://huggingface.co/datasets/vei66/rtp-variants-2026
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