These were produced after the original first three episodes of Wolfenstein 3D, when Scott Miller, after learning the time it took to make one level (a single day), convinced the id team to produce another trilogy. Tom Hall considered the possible plot options and hit on the idea of giftkrieg or chemical warfare. This led to producing the Nocturnal Missions.
The Nocturnal Missions were initially originally sold separately from the original three episodes (or together at a discount), but all new releases of Wolfenstein 3D sold ever since include all six episodes. The HTML version of the game on the Wolfenstein website, however only includes the first three episodes.
The Nocturnal Missions are a prequel series to the original three missions, leaving Episode Three with apparently the most recent subplot of all the Wolfenstein 3D era games. Hitler's men have developed chemical weapons and he plans to use them against the Allies to win the war.
- ↑ Kushner, David (2003). Masters of Doom: How Two Guys Created an Empire and Transformed Pop Culture.