Data & citation
Download the pick-rate data behind arammayhem.com, per patch, as JSON or CSV. Use it in articles, videos, tools or research. All we ask is a credit line with a link.
Latest patch in the data: 26.19 · Stats date:
Downloads
Latest (always the newest patch)
Machine-readable index of every file: https://arammayhem.com/data/v1/index.json
By patch
| Patch | Stats date | Files |
|---|---|---|
| 26.19 | Champions: JSON / CSVAugments: JSON / CSV | |
| 26.18 | * | Champions: JSON / CSVAugments: JSON / CSV |
| 26.17 | * | Champions: JSON / CSVAugments: JSON / CSV |
| 26.16 | * | Champions: JSON / CSVAugments: JSON / CSV |
| 26.15 | * | Champions: JSON / CSVAugments: JSON / CSV |
| 26.14 | * | Champions: JSON / CSVAugments: JSON / CSV |
| 26.13 | * | Champions: JSON / CSVAugments: JSON / CSV |
| 26.12 | * | Champions: JSON / CSVAugments: JSON / CSV |
| 26.11 | * | Champions: JSON / CSVAugments: JSON / CSV |
| 26.10 | * | Champions: JSON / CSVAugments: JSON / CSV |
Stats dates marked * are estimated from the capture time.
What is not included
This dataset has pick rates, pick-rate ranks and patch-over-patch changes. It does not include win rates, tiers, or rankings built from win rates. Riot asks developers not to publish Mayhem win rates for augments, so we keep them out of anything meant for reuse.
Where the data comes from
The stats are aggregated from ARAM: Mayhem matches on the China servers run by Tencent. They are not global data, and pick rates on other servers can differ.
License, in plain words
- The data is licensed under Creative Commons Attribution 4.0 (CC BY 4.0).
- You may use, copy, change and republish this data, including in commercial work.
- Credit it as "Data: arammayhem.com" (or the same line in your language) with a link to arammayhem.com or to this page.
- The data comes as is. It can contain mistakes, and a patch file can be corrected later.
- arammayhem.com isn't endorsed by Riot Games. League of Legends is a trademark of Riot Games, Inc.
How to cite
Copy one of these. A plain link is enough.
- HTML
<a href="https://arammayhem.com/data/">Data: arammayhem.com</a>- Markdown
[Data: arammayhem.com](https://arammayhem.com/data/)- Korean
데이터 출처: arammayhem.com (https://arammayhem.com/data/)- Japanese
データ出典: arammayhem.com（https://arammayhem.com/data/）- Chinese
数据来源：arammayhem.com（https://arammayhem.com/data/）
Field dictionary
JSON files wrap the rows with meta, license and this dictionary. CSV files hold the rows only, with one name column per language.
Champions
| Field | Type | Description |
|---|---|---|
championId | string | Riot champion key, e.g. TahmKench. |
slug | string | URL slug used on arammayhem.com. |
name / name_<locale> | string | Champion name per site locale. |
pickRate | number (%) | Share of games the champion appeared in, in percent. |
pickRateRank | integer | Rank by pickRate, 1 = most picked. Ties share a rank. |
previousPickRate | number | null | pickRate in the previous patch snapshot. |
pickRateChange | number | null | pickRate minus previousPickRate, in percentage points. |
previousPickRateRank | integer | null | pickRateRank in the previous patch snapshot. |
pickRateRankChange | integer | null | Places moved in the pick-rate ranking. Positive = more popular. |
url | string | Champion page on arammayhem.com. |
Augments
| Field | Type | Description |
|---|---|---|
augmentId | string | Stable augment id used by arammayhem.com. |
slug | string | URL slug used on arammayhem.com. |
name / name_<locale> | string | Augment name per site locale. |
rarity | string | silver, gold or prismatic. |
introducedPatch | string | null | Patch the augment entered Mayhem, when known. |
retiredPatch | string | null | Patch the augment left Mayhem, when known. |
pickRate | number (%) | Augment pick rate as reported by the stats source, in percent. |
pickRateRank | integer | Rank by pickRate, 1 = most picked. Ties share a rank. |
presence | new | continuing | unknown | new: not in the previous patch snapshot. unknown: no previous snapshot. |
previousPickRate | number | null | pickRate in the previous patch snapshot. |
pickRateChange | number | null | pickRate minus previousPickRate, in percentage points. |
previousPickRateRank | integer | null | pickRateRank in the previous patch snapshot. |
pickRateRankChange | integer | null | Places moved in the pick-rate ranking. Positive = more popular. |
url | string | Augment page on arammayhem.com. |
Combos
| Field | Type | Description |
|---|---|---|
comboId | integer | Combo id on arammayhem.com. |
slug | string | Combo URL slug. |
championId | string | Riot champion key. |
augmentIds | string[] | Augments in the combo (CSV: joined with |). |
types | string[] | Editorial combo tags (CSV: joined with |). |
url | string | Combo page on arammayhem.com. |
Items
| Field | Type | Description |
|---|---|---|
itemId | string | Item slug used by arammayhem.com. |
gameItemId | string | null | Riot numeric item id. |
name / name_<locale> | string | Item name per site locale. |
category | string | null | starter, basic, epic, legendary, consumable, trinket or vision. |
cost | integer | null | Total gold cost. |
File metadata
| Field | Type | Description |
|---|---|---|
patch | string | Game patch the stats describe: the patch live on statsDate. |
patchReleaseDate | date | Release date of that patch. |
statsDate | date | Day of play the aggregate covers. |
statsDateSource | release | estimated | release: recorded with the data. estimated: capture time in UTC+8, minus one day. |
capturedAt | datetime | When arammayhem.com captured the snapshot. |
comparedTo | object | null | The previous patch snapshot the change columns compare against. |
releaseId | string | Site data release the file was generated from. |
Changelog
- — v1: champion and augment pick rates for patches 26.10 onward, plus combo and item catalogs.
Contact
Found an error, or need a field we do not publish yet? Email arammayhem@gmail.com.