Duke Lost Episodes (1997)

Contains 40 new levels, The 4 Lost Episodes of Duke Nukem, way back when he was still working for the CIA (see Duke Nukem I). Apparently, before the fight with Dr. Proton, he had fought off an alien invasion of Earth (though more in secrecy), the selfsame ones that tried again later during Duke Nukem 3D.

• Release Date: June 30, 1997