3D Realms · PC · 2001 · Cancelled — Partial Footage Survived
The 1997–2001 era of Duke Nukem Forever was 3D Realms' first attempt to sequel Duke Nukem 3D, cycling through two complete engine rebuilds in four years and becoming gaming's most famous development hell before the rights were sold and a different game shipped a decade later.
Duke Nukem Forever was announced in April 1997, three months after Quake was demonstrating that Duke Nukem 3D's Build engine was already being outpaced technically. 3D Realms' George Broussard immediately committed to using id Software's Quake engine for the sequel, reasoning that matching Quake's visual standard was necessary to compete in the premium FPS market. Development began in earnest through 1997 using the Quake II engine, and early screenshots released in late 1997 showed a game with recognisable Duke aesthetics updated to contemporary 3D quality. The game appeared on schedule to ship in 1998. Then Quake III Arena was announced, and 3D Realms chose to switch engines again — abandoning Quake II in favour of the then-unreleased Quake III engine to ensure the finished game would again be state-of-the-art on release. The Quake II work was discarded, development restarted on the new engine, and the release schedule shifted indefinitely. Screenshots released between 1998 and 2001 showed environments of increasingly high visual quality but shifting design direction, as Broussard and the team continued modifying the game's content alongside the engine transition. 3D Realms was a profitable company from the continuing sales of Duke Nukem 3D and other titles, which insulated the Forever team from the commercial pressure that would have forced a smaller developer to ship or abandon the project. The 1997–2001 period is distinguishable from the game's subsequent development history as a specific creative phase with consistent visual direction — the Vegas-and-alien-invasion settings, the specific cast of enemy types, the more grounded take on Duke's personality compared to the cartoonishness that characterised later builds. Several minutes of gameplay footage from this era was shown at E3 2001 to press attendees and generated positive coverage, suggesting the game was approaching a releasable state. 3D Realms then went silent for years, during which the team was reduced and the engine underwent further modifications. The original Quake III-based build was apparently abandoned in favour of a custom engine by 2004, at which point the 1997–2001 work had been effectively discarded for the third time. 3D Realms ran out of funding in 2009 and was forced to dissolve their development team, handing the intellectual property to Gearbox Software. Gearbox assembled the remaining assets into a shippable product that released in 2011 to poor reviews — a game built from scattered remains of multiple development eras rather than a coherent vision. The 2011 Duke Nukem Forever was not the game any of the 1997–2001 screenshots had promised. In 2022, a leaked build of the 2001 version circulated online, and the gaming community was able to compare it against the shipped 2011 product directly. The 2001 build was more coherent than its reputation had suggested — a straightforward corridor shooter without the 2011 version's controversial design choices — but also incomplete in ways that confirmed it had been correctly assessed as unshippable.