Tim and Chris Stamper
From RWP Wiki
Tim Stamper and Chris Stamper are the original founders of Ultimate Play the Game and Rare. Tim Stamper is an artist, while Chris Stamper is a programmer. Originally, the brothers Stamper were involved directly in the design of the company's earliest games, such as Jetpac, although they later took on a more supervisory role.
On January 2, 2007, it was announced that the Stampers would be leaving Rare to pursue other opportunities, although it is still unknown exactly what these plans are.