The Depths of Doom Trilogy was a commercially-sold compilation released on October 28, 1997. It included three CD-ROMs:
- The Ultimate Doom version 1.9 (DOS and Windows 95); Heretic version 1.2 shareware.
- Doom II: Hell on Earth version 1.9 (DOS and Windows 95).
- Master Levels for Doom II; Maximum Doom; DWANGO version 2.02; locked versions of The Ultimate Doom, Doom II, and Heretic.
The package also includes a single instruction manual containing information edited together from the three individual Doom game instruction manuals.