Adventure

Adventure is a 1979 video game for the Atari 2600 video game console. In the game, the player controls a square avatar whose quest is to hunt an open world environment for a hidden magical chalice, returning it to the yellow castle. The game world is also populated by roaming enemies: dragons, which can eat the avatar; and a bat, which randomly steals and hides items around the game world. Adventure was conceived as a graphical version of the 1977 text adventure Colossal Cave Adventure. It took developer Warren Robinett approximately one year to design and code the game, during which time he had to overcome a variety of technical limitations in the Atari 2600 console hardware. In this game, he introduced the first widely known video game Easter egg, a secret room serving to credit him for the game's creation. As the first action-adventure game released, Adventure sold more than a million copies and essentially created the genre. It spawned a handful of official and unofficial sequels, and has been included in numerous Atari 2600 collections.

According to the game's instructions, an evil magician has stolen the Enchanted Chalice and hidden it somewhere in the kingdom. The player's goal is to find the Chalice and return it to the Golden Castle. The player character, represented by a square avatar, explores a multi-screen landscape containing castles, mazes, and various rooms, with thirty rooms in all. Hidden throughout the world are a sword, keys that unlock each of the three castles (golden, black, and white), a magic bridge that allows the avatar to travel through barriers, and a magnet that attracts the other items toward it. While Robinett originally intended for all rooms to be bidirectionally connected, a few such connections (including one inside the White Castle) were unidirectional, which he considered to be bugs. Such problems were explained away as 'bad magic' in the game's manual.

Roaming the world are three dragons: