Early GTA IV Dev Build Discovered on Scottish Flea Market Xbox 360

GTA Forums user janmatant paid five pounds for what looked like a chunky, oddly modified Xbox 360 at an Edinburgh car boot sale. The device carried a Rockstar North asset label, ran the developer-exclusive Xshell operating system, and had a 120GB hard drive containing a single file: a 118GB build of Grand Theft Auto IV dated November 23, 2007, five months before the game's April 2008 retail release.

The unit is an Xbox 360 XDK with a "Sidecar" expansion block attached, the additional hardware found on development consoles. "When doing my rounds, I saw what I immediately recognised as a Phat Xbox 360, with what I first thought looked like a 'tumour' sticking out of it, later turning out to be the Sidecar," janmatant explained. He asked the seller for a price, received "five pounds" as the answer, and handed over a ten-pound note. The change he got back made it the most consequential six-dollar transaction in GTA history.

Janmatant uploaded the entire archive to the Internet Archive under the title "Great Stealing of Vehicles four XDK," and the community moved fast. GTA Forums users Lukakion and HeySlickThatsMe identified file clusters carrying "Zomb" naming conventions, consistent with a scrapped zombie minigame long theorised under the label "Z: Resurrection." Those asset clusters included specific item pickups, mangled police bodies, and a bloody hospital gurney. The beta also contained a working Liberty Ferry model, visible in the game's very first trailer but absent from retail GTA IV, along with beta cutscenes, different weapon sets, unused vehicles, altered radio stations, and early character models reworked before launch.

Former Rockstar North technical director Obbe Vermeij, who shipped GTA III, Vice City, San Andreas, and GTA IV, responded publicly to pour measured cold water on the hype. "There really isn't a lot of cut content in GTA 4," Vermeij wrote. "Just some experiments that were abandoned at various stages or that we didn't have time for to finish. The development of IV was much more 'planned out' than the trilogy before it." On the zombie assets specifically, Vermeij acknowledged that Rockstar artists were "always trying to put zombies in things," calling it "not something that got very far." He confirmed the ferry was pulled due to AI and physics complications, and said he had no idea how the build had ended up in a boot sale at all.

Rockstar moved quickly to contain the leak. The Internet Archive upload disappeared, GTAForums banned link sharing, and Hidden Palace pulled its materials. The community had already distributed the build widely regardless, and beta footage and modded assets continued circulating. Fan Jorby separately got the full pre-release build running on a real Xbox 360 by supplementing gaps with retail assets. Janmatant, who listed the physical hardware briefly on eBay for £800 without finding a buyer, said he intends to sell the dev kit as a single complete unit.

For a studio that guards its development process as tightly as Rockstar, the fact that a five-pound boot sale buy peeled back eighteen years of secrecy makes this the most disruptive GTA IV primary source to surface since launch. With GTA 6 scheduled for November 19, 2026, Liberty City's unfinished business is unlikely to stay quiet.