Adventure

Adventure is considered the first action-adventure ever created and it's one of the most important titles of the video game history. Developed by Warren Robinett for Atari, it was released in 1979-1980 for the Atari 2600 console.

The player controls a square avatar that has to explore the world, collect keys, solve puzzles and kill monsters. The game was a huge success, with more than one million copies sold, and it was critically acclaimed for its innovative gameplay.

Adventure is famous also because it contains the first known video game hidden "Easter egg" (a secret room containing the text "Created by Warren Robinett"), that was added by the developer without informing Atari and it was discovered only after the release.