Agon: The Lost Sword of Toledo is the fourth episode and the second full-disc instalment in the AGON adventure game series, with all-new characters and original puzzles. The new title has been given a range of additional features, including more detailed, manually animated characters, more realistic graphics with new 3D effects, and dialogue-oriented storytelling, while still retaining the features of the previous instalment; integrated, story-based puzzles, authentic surroundings and background music with local elements. Agon: The Lost Sword of Toledo features Professor Samuel Hunt as its protagonist, who travels to the famous Spanish city as a next step in his journey in pursuit of the mysterious lost board games.