MAYHEMLAB DESKTOP CLIENT v2.5.1 • WINDOWS SOURCE PREVIEW
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MayhemLab is a third-party League of Legends companion for personal match analysis.
This download is a source-based Electron preview, not a signed Windows installer.

INSTALL
1. Install Node.js 22.12 or newer from https://nodejs.org/ if needed.
2. Extract this entire ZIP into a new normal folder on your Windows 10/11 PC.
3. Double-click Launch-MayhemLab.cmd. Internet is needed for Electron dependency installation on the first launch.
4. Open League of Legends normally on this PC; local detection remains local.
5. Optional: In Settings > Community service, use the HQ connection check. Discord pairing is optional; connected community features can post your selected progress to Discord channels and community leaderboards.

DATA & PRIVACY
- Personal match history is stored locally by default.
- Optional community data that you submit may be retained by MayhemLab HQ and may be displayed to other members.
- Community results are client-submitted; they are not Riot-verified or an official ranking.
- Review https://mayhemlab.win/privacy.html and /terms.html before using the preview.
- Never provide Riot login credentials to MayhemLab. Only sign in on official Riot pages.

This is an independently developed preview. Production Riot API features are not enabled for public use until Riot approval.
For support and questions: https://mayhemlab.win/community.html
