These planets all dated back to the early days of the OASIS, and each one re-created the environment of some classic text adventure game or MUD (multi-user dungeon). Each of these worlds was a kind of shrine—an interactive tribute to the OASIS’s earliest ancestors. Text adventure games (often referred to as “interactive fiction” by modern scholars) used text to create the virtual environment the player inhabited. The game program provided you with a simple written description of your surroundings, then asked what you wanted to do next. To move around or interact with your virtual surroundings, you keyed in text commands telling the game what you wanted your avatar to do. These instructions had to be very simple, usually composed of just two or three words, such as “go south” or “get sword.” If a command was too complex, the game’s simple parsing engine wouldn’t be able to understand it. By reading and typing text, you made your way through the virtual world, collecting treasure, fighting monsters, avoiding traps, and solving puzzles until you finally reached the end of the game.
