Eureka! is a video game for the Commodore 64 and ZX Spectrum computers, developed by Ian Livingstone and published by Domark in 1984.Eureka! is a text adventure set in European history. It consists of five parts, each of which has to be loaded and played separately. The first four parts can be played in any order, but the fifth part can only be played after all the other parts have been completed.The parts are: Prehistoric Europe: Set in a valley somewhere in the Jurassic period.