135 Unreleased Dreamcast Prototypes Released by Hidden Palace « SEGADriven
4 Wheel Thunder Download | GameFabrique
Luigi has been hiding in a Dreamcast game prototype for 21 years | GamesRadar+
RetroCorner
4 Wheel Thunder for Sega Dreamcast - The Video Games Museum
4 Wheel Thunder Download | GameFabrique
Sega GT - Wikipedia
The Hidden Palace on Twitter: "Some Dreamcast highlights include - Debug enabled builds of Jet Grind Radio and Illbleed, a unreleased English localization of Shangai Dynasty, an early build of 4 Wheel
Remembering the Sega Dreamcast, the Racing Gamer's Console of Choice