Brothers Tim and Chris Stamper are British entrepreneurs who founded the video game companies Ultimate Play the Game and Rare. They first worked together on arcade conversion kits, which were licensed to companies, but later became developers for the ZX Spectrum home computer in the early 1980s. Chris programmed the games, while Tim designed the graphics. They found success as Ultimate with games including Jetpac and Knight Lore. After reverse engineering the Nintendo Entertainment System and deciding to shift their focus to console development, the brothers founded Rare in the mid-1980s. They became Nintendo's first major Western developer, for whom they developed licensed games and ports. Over the next two decades, Rare enjoyed a close relationship with Nintendo and developed multiple major titles for the company, including Donkey Kong Country and GoldenEye 007. Microsoft acquired Rare in 2002, and the brothers left the company in 2007. After spending several years out of the public eye, the brothers are currently planning new ventures.

Ashby Computers and Graphics Limited, trading as Ultimate Play the Game, was a British video game developer and publisher, founded in 1982, by ex-arcade video game developers Tim and Chris Stamper. Ultimate released a series of successful games for the ZX Spectrum, Amstrad CPC, BBC Micro, MSX and Commodore 64 computers from 1983 until 1987. Ultimate are perhaps best remembered for the big-selling titles Jetpac and Sabre Wulf, each of which sold over 300,000 copies in 1983 and 1984 respectively, and their groundbreaking series of isometric arcade adventures using a technique termed Filmation. Knight Lore, the first of the Filmation games, has been retrospectively described in the press as "seminal ... revolutionary" (GamesTM), "one of the most successful and influential games of all time" (X360), and "probably ... the greatest single advance in the history of computer games" (Edge).