Ultimate Add On Collection for Doom & Doom II

The Ultimate Add On Collection for Doom & Doom II is a commercial compilation made by SoftKey and published in 1995. It contains, approximately, 1800 WAD files across both games, as well as various other utilities and tools. Among the included files, there is a considerable collection of graphics that can be used by the user in level making, as well as sounds, visuals and cheat engines.

The Ultimate Add On Collection for Doom & Doom II includes several frontend launchers, such as DOOM-IT, Doom/Master, WAD_Runner, Deathday and various others. A set by Microforum called Deathday featured the same cover artwork.