The Hitchhiker's Guide to the Galaxy a human-like alien writer for the eccentric, electronic travel guide "The Hitchhiker's Guide to the Galaxy", by hitchhiking onto a passing Vogon spacecraft. Following his rescue, Dent explores the galaxy with Prefect and encounters Trillian, another human who had been taken from Earth prior to its destruction by the President of the Galaxy, the two-headed Zaphod Beeblebrox, and the depressed Marvin, the Paranoid Android. Certain narrative details were changed between the various adaptations. The various versions follow the same basic plot but they are in many places mutually contradictory, as Adams rewrote the story substantially for each new adaptation. Throughout
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