The Hitchhiker's Guide to the Galaxy President; the depressed robot Marvin the Paranoid Android; and Trillian, formerly known as Tricia McMillan, a woman Arthur once met at a party in Islington and the only other human survivor of Earth's destruction thanks to Beeblebrox' intervention. The first radio series comes from a proposal called "The Ends of the Earth": six self-contained episodes, all ending with Earth's being destroyed in a different way. While writing the first episode, Adams realized that he needed someone on the planet who was an alien to provide some context, and that this alien needed a reason to be there. Adams finally settled
The Hitchhiker's Guide to the Galaxy (video game) actions not in the radio play or book that the player must perform to make the game winnable. Other puzzles are based so closely on the book or radio play as to be solvable only by those who are intimately familiar with Adams' work. In spite of all of this, "The Hitchhiker's Guide to the Galaxy" was rated as "Standard" difficulty by Infocom's rating system, though it was advertised to be at expert difficulty. The player is seldom given an actual purpose, apart from the implicit goal stated by the inventory item of "no tea". Much of the game is