Mayhempedia
Mayhempedia is a local-first Windows companion for League of Legends ARAM: Mayhem.
It helps players turn a champion roll into a practical route: augment priorities,
item order, route reasoning, and locally stored match capture.
Official site: https://mayhempedia.com
What it does
- Browse route files for the full champion roster.
- Read core and alternate augment priorities alongside starter and final items.
- Show a display-only overlay. It does not automate gameplay or make game actions.
- During an ARAM: Mayhem augment choice, mark each of the three cards with its S–D
rating for your champion. A card with no rating for your champion shows a dimmer
reference rating taken from champions of the same class. The app captures the
screen only while a choice is pending and reads the card names locally; the game
must run in borderless or windowed mode, and only the English game client is
supported for now.
- Read local League Client state to recognize champion select.
- Keep settings, custom routes, and optional local match history on the player device.
Match history is never trimmed: every Howling Abyss game the app sees is also kept in
a local archive (each player's champion, augments, and items, without other players'
names) for future local statistics. Forgetting an account in settings removes both.
What it does not do
- It does not ask for Riot account passwords.
- It does not read League of Legends game memory.
- It does not automate clicks, purchases, champion actions, or augment choices.
- It does not upload match history or desktop usage telemetry.
More detail is available in the privacy and play-safety note.
Status
Mayhempedia is in closed beta. Product updates and test access news are posted on
the official Discord. Public Windows installers
are published only after they have been code signed and verified.
Development
Requirements: Node.js 22+ and a local League Client installation for end-to-end
LCU testing.
npm install
npm start
npm start builds the Electron main process and Vite renderer, then opens the
desktop app. Use npm run validate to validate route data and localization.
Data and attribution
Mayhempedia combines public League client data, CommunityDragon assets, public
ARAM: Mayhem information, and curated route research. Augment data and combo
picks: Data: arammayhem.com (CC BY 4.0). It is a
fan-made project and is not endorsed by Riot Games.
Contributing and feedback
Report product problems or route-data issues through
GitHub Issues, or discuss
closed-beta feedback in Discord. Contributions from non-maintainers should use a
pull request so a maintainer can review the change before it reaches main.
Code signing policy
See CODE_SIGNING_POLICY.md. The policy explains who
may approve a release, how a release is built, and how a public Windows artifact
is verified before distribution.
License
Mayhempedia is licensed under the MIT License.
