DTS-T is not the worst PWAD in the world (nor the worst PK3). Released in 2012 by Ingmar Derks, it is a 33-level mapset for Doom II to be played in ZDoom-family ports, featuring a lot of scripting and voice-acting from the author, delivered via a few audio logs and many one-sided radio communiques from your handler. It has a few new enemies and a handful of textures, mainly from R667 and Final Doom. Most of its music selection comes from the IWADs (and Duke 3D, of course). It's also been in development for awhile; Derks claims to have started work back in 1998 and a Doomworld forums search reveals an ancient news post circa 2002 teasing a potential demo (eventually released in 2003).
