Jeff Minter is an English video game designer and programmer who often goes by the nickname Yak. He co-founded independent video game developer Llamasoft in 1982 and was the sole game designer and programmer until Ivan Zorzin started being co-credited in 2008. Minter has created dozens of games, starting in 1981 for the ZX80, then later the ZX Spectrum, VIC-20, Commodore 64, Atari 8-bit computers, Amiga, Atari ST, Jaguar, and other systems. A majority of Minter's projects are shoot 'em ups, often based on games from the golden age of arcade video games such as Defender, Tempest, and Robotron: 2084. Minter has evolved a game design style which combines psychedelic visuals, references to ruminants, and quirky audio samples.