Kadoom is a KDE desktop application to configure and start a Doom game engine. Instead of having to use a complicated command line, engine options can be set using the GUI.
In addition, game addons and demo files can be automatically fetched from a remote Web site or FTP server using KDE's network access. No need to manually download and unzip files, the best Doom action is just a few clicks away!
Note that a game engine also needs to be installed to play Doom. Currently Kadoom supports Doomsday, PrBoom and EDGE.