The Stampers were co-founders of Rare Ltd., a game studio that made its name developing games such as “Donkey Kong Country” for Nintendo consoles.
Nintendo bought a stake in Rare after Rare showed Nintendo how to compress data onto a game cartridge in 1993, according to this biography.
Four years ago it hooked up with another Redmond company when Microsoft bought Rare for $375 million.
Rare created high-profile Xbox titles such as “Perfect Dark Zero,” “Kameo” and the recently released “Viva Pinata,” but so far they haven’t been blockbusters.
Microsoft told 1UP that sales performance had nothing to do with the Stampers’ departure. “They are simply leaving to pursue other opportunities and we wish them luck in their future endeavors,” an unidentified spokesperson said.