Zork

Zork was one of the first interactive fiction computer games and a descendant of Colossal Cave Adventure. The first version of "Zork" was written in 1977–1979.
"Zork" was originally MIT hacker slang for an unfinished program. The creators named the completed game "Dungeon", but changed it back to "Zork" after receiving a trademark violation notice from the publisher of "Dungeons &amp; Dragons". Zork has also been adapted to a book series.
Three of the original "Zork" programmers joined with others to found Infocom in 1979. That company adapted "Zork" into "Zork I-III", a trilogy of games for most popular small computers of the era. Personal Software published what would become the first part of the trilogy under the name "Zork" when it was first released in 1980, but Infocom later handled the distribution of that game and their later games. Part of the reason for splitting Zork into three different games was that, at the time, micros did not have enough memory and disk storage to handle the entirety of the original game. In the process, more content was added to Zork to make each game stand on its own. A version of "Zork I" was issued as a hidden 'easter egg' in . It has exactly the same text and rules as the original.
Setting.
"Zork" is set in "the ruins of an ancient empire lying far underground". The player is a nameless adventurer "who is venturing into this dangerous land in search of wealth and adventure". The goal is to return from the "Great Underground Empire" alive with the treasures, ultimately inheriting the title of Dungeon Master. The dungeons are stocked with many novel creatures, objects and locations, among them grues, zorkmids, and Flood Control Dam #3—all of which are referenced by subsequent Infocom text adventures.
FrobozzCo International is a fictional monopoly from the game. FrobozzCo products are littered throughout all "Zork" games, often with humorous effect.
Zork series.
Later additions to the series.
All these are text-only unless otherwise noted.
After a six year hiatus, the following games were produced: