Master Levels for Doom II

Master Levels for Doom II is the first expansion pack for the computer game Doom II, released officially on 26 December 1995 by id Software. The CD contains twenty WAD files created by various authors under contract. The file teeth.wad contains a secret level, so there are a total of 21 levels. As a bonus, 1,830 amateur WAD files downloaded from the Internet are also included. The Master Levels were also added to the Xbox game Doom 3: Resurrection of Evil