Vortex Software was a video game developer founded by Costa Panayi and Paul Canter in the early 1980s to sell the game Cosmos which Panayi had developed for the Sinclair ZX81. They converted the game to the ZX Spectrum, but due to the low sales of the ZX81 version they licensed the game to Abbex. Luke Andrews, Costa's brother-in-law, and Crete Panayi, Costa's brother, became involved to handle the business affairs and advertising respectively. The company was based at 280 Brooklands Road, Manchester, M23 9HD.