Here is an unfinished mod by the Letkyx team. In August 2004 source files of this project (more than 50 maps, new textures, models and sounds) were totally lost after hacker’s attack and so the project was cancelled. Recently one of Letkyx’s members decided to upload some of the remaining files. It’s not a fully working mod: to play you must load maps manually, using the console. Many other features were also sadly lost.