The game Eureka! (1984) was a text adventure with some illustrations that consisted of five epic adventure games. Each was preceded by an arcade game in which the player could gain more stamina points for the next quest. Together with a lavish booklet, it was offered as a package. Each Adventure has its own plot, which, when solved, will lead the player to a piece of the talisman. If you collect all five talismans, you solve the game.

The English version was published in 1984 by Domark Limited. A reward was offered to the first person that could complete the challenge of all five chapters.Domark had enough confidence in the release of the game to offer an enormous reward of £25,000. The prize money was a sensation and naturally attracted a lot of press.

The Swiss entrepreneur Markus Grimmer translated the text adventure written by Jan Liningstone into German. He went to Hungary as a game producer and produced the German version with the Hungarian studio Andromeda Software. The players of the German version were also expected to join in the hype. Grimmer placed some eye-catching advertising for the extraordinary reward, similar to the one in Happy Computer 3/1985, where he even offered a 24-hour hotline for players. Unfortunately, Domark terminated the contract with him and published the German version in 1985 with Rushware.