Original: Plutonium PAK/Atomic Edition: The Atomic Edition of Duke Nukem 3D was released in November 1996, and contained the original 3 episode game as well as a new eleven-level fourth episode.
Simplified: Plutonium PAK/Atomic Edition: The Atomic Edition of Duke Nukem 3D was first sold in November 1996, and contained the original 3 episode game as well as a new eleven-level fourth episode.