Dungeons & Dragons (also known as D&D)
Dungeons & Dragons was initially a paper and dice based role playing game designed purely for entertainment. Eventually, however, computer versions were created by fans, and then companies. The entertainment aspects dominated the motivations of the player community, but D&D's role extended to creativity training and personality therapy.

D&D also inspired many of the modern role playing games; e.g. World of Warcraft, etc. The arithmetic and logic systems in D&D became models for other games, and also introduced players to structured yet creative play. The introduction of computers changed the lessons learned by players. The paper based game required arithmetic and logic skills that were subsequently handled by the computer in later versions. By relieving the player from the mechanics of maintaining status updates and scores, creativity was able to expand.

Thanks to Internet Archive for finding this 1984 version and for this 1987 ability scores generator.

In case you want to play the game because why not? Here are the rule books as pdfs.

Inducted into the Toy Hall of Fame.