AGON: The Lost Sword of Toledo is the fourth installment in the AGON Episodic Adventures series. Professor Samuel Hunt travels to Toledo, Spain, in search of another lost board game and another page of the Mysterious Codex. Unfortunately, the current owner of the board game has been jailed on suspicion of the theft of a sword. Only if he helps prove the suspect innocent can Samuel hope to find the missing items and continue his quest.
The game is a point-and-click adventure with node-based movement, full 360 degrees circumferential visibility and challenging puzzles. A map of Toledo lets the player change locations within the city. After choosing a new location, and after solving some puzzles, comic-style animated cut-scenes are shown.