The story for players began in Portal Year 10. Through the game's monthly updates the story unfolds. Not only do players experience the current events of the world, but as the months go on and they explore, they learn much about the past. Several monthly updates build upon each other, forming a story arc. Each story arc usually lasts around one year.

The story for players began in Portal Year 10. Through the game's monthly updates the story unfolds. Not only do players experience the current events of the world, but as the months go on and they explore, they learn much about the past. Several monthly updates build upon each other, forming a story arc. Each story arc usually lasts around one year.