The Ultimate Doom Trilogy: Collector"s Edition is a commercially-sold combination pack initially released in September, 2001. It includes the following three games:
[ul]
[li]Ultimate Doom
[li]Doom II
[li]Final Doom
[li]XBox 360 Exclusive DLC "No Rest for the Living"[/ul]
The games come with the Doom95 executable. The original DOS executables are not included in the game pack. The package was re-released on January 29, 2003, and includes a trailer, screenshots, and other information regarding Doom 3 (which was not released until August 3, 2004).
This game package now comes with the new XBox 360 Exclusive DLC "No Rest for the Living" for Doom 2. You must use a proper engine to run the files.