Released soon after
Doom 2,
Ultimate Doom is a re-released version of
Doom which consists of the original
Doom Trilogy ('
Knee Deep in the Dead', '
The Shores of Hell' and '
Inferno') along with a new (and much harder) episode, '
Thy Flesh Consumed'.
This update was criticised by many for adding nothing new to the Doom series as there are no new weapons or monsters to be found in the additional episode, although some of the new level designs are exceptional.