Duke Nukem 3D

As a first-person shooter whose gameplay is similar to Doom, the gameplay of Duke Nukem 3D involves moving through levels presented from the protagonist's point of view, shooting enemies on the way. The environments in Duke Nukem 3D are highly destructible and interactive; most props can be destroyed by the player.

Levels were designed in a fairly non-linear manner such that players can advantageously use air ducts, back doors, and sewers to avoid enemies or find hidden caches. These locations are also filled with objects the player can interact with. Some confer gameplay benefits to the player; light switches make it easier to see, while water fountains and broken fire hydrants provide some health points. Others are simply there as a diversion. Tipping strippers provokes a quote from Duke, and a provocative reveal from the dancer.

Duke Nukem 3D is set on Earth "sometime in the early 21st century". The levels of Duke Nukem 3D take players outdoors and indoors through rendered street scenes, military bases, deserts, a flooded city, space stations, Moon bases, and a Japanese restaurant.

The game contains several humorous references to pop culture. Some of Duke's lines are drawn from movies such as Aliens, Dirty Harry, Evil Dead II, Full Metal Jacket, Jaws, Pulp Fiction, and They Live; the captured women saying "Kill me" is a reference to Aliens. Players will encounter corpses of famous characters such as Luke Skywalker, Indiana Jones, Snake Plissken, the protagonist of Doom, and a smashed T-800. In the first episode, players navigate a tunnel in the wall of a prison cell hidden behind a poster, just like in The Shawshank Redemption. During the second episode, players can see a Monolith (from 2001: A Space Odyssey) on the Moon and use it as a teleport to complete the level.

Duke Nukem 3D was developed on a budget of roughly $300,000. The development team consisted of 8 people for most of the development cycle, increasing to 12 or 13 people near the end. At one point, the game was being programmed to allow the player to switch between first-person view, third-person view, and fixed camera angles. Scott Miller of 3D Realms recalled that "with Duke 3D, unlike every shooter that came before, we wanted to have sort of real life locations like a cinema theatre, you know, strip club, bookstores..." The game's development started in 1994.

LameDuke is an early prototype of Duke Nukem 3D, which was released by 3D Realms as a "bonus" one year after the release of the official version. It has been released as is, with no support. LameDuke features four episodes: Mr. Caliber, Mission Cockroach, Suck Hole, and Hard Landing. Certain weapons were altered from the original versions and/or removed.

Duke Nukem 3D was a commercial hit, selling about 3.5 million copies. In the United States alone, it was the 12th best-selling computer game in the period from 1993 to 1999, with 950,000 units sold. NPD Techworld, a firm that tracked sales in the United States, reported 1.25 million units sold of Duke Nukem 3D by December 2002.