Digital: A Love Story

The game's story is linear, with the player's actions unable to significantly change the course of the plot. Set "five minutes into the future of 1988", Digital tells the story of the protagonist's online relationship with a girl and their attempts to solve a mystery surrounding the deaths of several artificial intelligences. The game is presented entirely through the interface of a 1980s computer with online bulletin board system posts and messages from other characters. (wikipedia)