Dungeon Crawl Tournament March 13th - 29th
Because they were played on shared university servers, many of the early roguelikes, including Rogue, had an asynchronous multiplayer component. This was more than just a high-score list: you could encounter the dead bodies of other player’s characters, often with their stuff and the thing that killed them still lurking around.
Some roguelikes, including Nethack and Dungeon Crawl, still offer public servers. As part of this they sometimes have public tournaments. Coincident with the release of the next version, the Crawl 0.16 Tournament is being held online.