AGON is a series of episodic adventure games for Mac OS X and Microsoft Windows by Private Moon Studios.

The player takes the role of Professor Samuel Hunt, a cultural historian at the British museum, and explores a 3D pre-rendered environment using a 360° field of view and moving between the various locations and interacting with objects and characters by clicking.

The stone Vainio gave to Hunt takes him to Madagascar, searching for a certain Rakotonorivelo, who owns the next board game.

Whilst travelling to Toledo, Spain, Hunt receives a letter from Smythe informing him that the codex pages he has recovered in the previous episodes are fakes.

He can do little but continue to Toledo, where he discovers the owner of the board game he is searching for, a young man known for his honesty, has been imprisoned on charges of theft of an ornamental sword.

Hunt attempted to prove his innocence, and recover the lost sword to play Francisco Candelas at Alquerque.