Ledmeister is the creator/maintainer of ClassicDOOM.com, which offers reference material and gameplay support for commercial classic Doom games on PCs and game consoles. He is the author of several Doom documents predating that site, including the Doom comparison guide, Doom cheat codes guide, ghost monster FAQ, and specialized password lists for a variety of console Doom games. His other works include the multiplatform Quake cheat codes guide, and various reference documents for other games.