Jeff Minter (born in 22 April 1962 in Reading) is an independent English video game designer and programmer who often goes by the name Yak. He is the founder of software house Llamasoft and has created dozens of games during his career. Minter's games are often arcade style shoot 'em ups which contain titular or in-game references demonstrating his fondness of ruminants (llamas, sheep, camels, etc.). Many of his programs also feature something of a psychedelic element, as in some of the earliest "light synthesizer" programs including Trip-a-Tron.
Minter's works include the music visualisation program Neon (2004) which is built into the Xbox 360 console, and the video games Gridrunner, Tempest 2000, Space Giraffe (Xbox Live Arcade, 2007 and PC, 2008), and GoatUp (iOS 2011). SOURCE: Wikipedia