It is unstable. It is buggy in some corners. It requires three different third-party launchers to function. But sliding a brand-new Porsche 911 Turbo S past the Rockport County Sheriff's Department with Blinded in Chains blasting on the radio is a gaming experience you cannot get anywhere else—not in Forza, not in The Crew.

To this day, no one has found the source code for the Extra Cars Mega Pack. But every so often, a player will boot up an old copy of Most Wanted , and for a split second—before the main menu loads—they’ll see a car that doesn’t belong.

A thousand players simultaneously logged into a custom server Hex spun up at 3 a.m. They called it the Every extra car, every cheat, every hidden boss—all unleashed on a single, endless loop of the I-95 highway.