The development of Dinosaur Planet began in late 1997 after the release of Diddy Kong Racing. Rare was wanting to make a spin-off to the title, using 

The goal was to make an unforgettable, ambitious action/adventure title to end off the 5th generation; a swan song, as many described it. The small development staff at Rare aimed to do what many thought was impossible for the hardware, including interactable, fully-voiced NPC's,