You, in the role as the scientist Professor Samuel Hunt, receives a mysterious letter, while working late at night, at the British Museum.
The letter contains a puzzle regarding artifacts recently taken into possession at the museum. Determined to solve the meaning of the puzzle, and mysteries of the AGON, (Ancient Games of Nations), the Professor will search for clues in three cities: London, Lapland and Madagascar. What the Professor uncovers is the AGON - a series of board games that he must win in order to unlock the next mystery, and the next game. Instead of just having an adventure game, AGON is an adventure game - and board game in one package.
"Agon: The Mysterious Codex" is really a collection of the first three episodes of a long adventure, which spans over a total of 14 episodes: "1 - London Scene", "2 - Adventures in Lapland", and "3 - Pirates of Madagascar"
The game is basically a normal point-and-click adventure, played in 1st-Person Perspective, with 3D characters and video cut-scenes.