Published by Adventure International and the second game of the series, after Adventureland, this text-based adventure game was one of many adventure games created by Scott Adams, in this case based on his wife Alexis' ideas. The setting was inspired by the novel Treasure Island and involved a quest to retrieve Long John Silver's lost treasures.
The player started the game in a flat, and progressed via a bit of magic to Pirates Island. Here, the player had to build a ship to reach Treasure Island and there find two pieces of treasure. The player also had to contend with an unpredictable pirate ally; it was the first text adventure game of the Adams series in which the player shared the adventure with a second character.
The magic phrase to reach the island in this game, 'Say Yoho', was the name of a long-running column in SoftSide magazine by Scott Adams.
The source code for Pirate Adventure was printed in the December 1980 issue of BYTE, with an addendum in April 1981. This enabled others to discover how the engine worked and to create their own adventures using this or a similar design.
Pirate Adventure was reviewed in issue #42 of The Dragon magazine. The reviewer, Mark Herro, commented on the difficulty of the game: "Supposedly one of the "easier" programs of the series, I’m embarrassed to say that I have yet to find a treasure in Pirate Adventure... This Program has been sending me in circles for weeks."