Blert is a RuneLite plugin, data analysis pipeline, and web tool designed to help Old School RuneScape players track and improve their performance in challenging player-versus-monster content. Initially focused on Theatre of Blood, the service is expanding to support a wider range of endgame activities, including Inferno, Colosseum, Doom, Tombs of Amascut, and Chambers of Xeric. Players can browse recorded runs, leaderboards, performance trends, gear setups, and community guides, then use these resources to learn from their own experiences and compare strategies.

Blert also offers live activity tracking and tools for following PvM progress. The plugin is available through the RuneLite Plugin Hub, and users can create an account and generate an API key to begin tracking. Discord is optional, though Blert recommends linking it for bot integration and account support.

The project welcomes community involvement, including code contributions, user-experience feedback, feature suggestions, and requests for help. Its broader goal is to make detailed PvM data analysis more accessible to the Old School RuneScape community