John from DSOGaming writes: “DukeBoss and a team of modders have released a new fan expansion for Duke Nukem 3D, Duke Nukem: Alien Armageddon. According to its description, Alien Armageddon is a mod for Duke Nukem 3D which adds many new high quality enemies, sexy NPCs, and a second playable character, all featured in an epic new adventure.”
Source: N4G PC Duke Nukem 3D receives a new unofficial expansion, featuring a whole new episode with new enemies