Download the installer
Click Download for Windows to get the official MayhemLab v2.5.1 setup file.
Play League, review your matches, and explore personal insights with the MayhemLab desktop companion. Optionally connect to the MayhemLab HQ community for shared achievements and broadcasts. Community participation is voluntary.
Your Windows League companion for personal insights, achievements, and optional connected MayhemLab HQ features. Download the app, explore your matches, and join the community when you choose.
e61454d80a77f32bd03ac3366ff260868a2350ece4269d1a1a8b33d9cd50713bVerified against the checksum published by GitHub for the v2.5.1 release.Download the Windows installer and follow the setup wizard. Node.js, ZIP extraction, and command-line launch scripts are not required.
Click Download for Windows to get the official MayhemLab v2.5.1 setup file.
Open MayhemLab-Setup-2.5.1.exe and follow the installation wizard. Windows may display an unrecognized-publisher warning because this preview is not code-signed.
Open MayhemLab from your desktop or Start Menu. Run League of Legends normally on the same computer to use supported game integrations.
Open Settings → Community service, choose Check HQ Connection, and link Discord with the six-digit pairing flow if you want shared achievements, rankings, and broadcasts.
MayhemLab is distributed as a Windows desktop installer. Connected community features may have restricted availability during early testing and Riot-related approvals. See how MayhemLab works ↗
MayhemLab is an independent preview that has not been approved as a Riot Production application. Features that require Riot Production API access will not be offered publicly until the appropriate approval is obtained. Community features require an active MayhemLab HQ connection.
The browser demo uses fictional sample match data and does not connect to League or Discord. Review the product design, data boundaries and intended Riot API usage first.