A scientific analysis of The Secret of Monkey Island investigates whether grog, a fictional corrosive beverage from the 1990s point-and-click adventure game, could realistically dissolve a pewter mug in 35 seconds as depicted in the game's puzzle mechanics. The study treats the game's observation as an inverse problem, using the observed rate of mug deterioration to estimate the chemical properties and proton supply required to explain grog's corrosivity according to corrosion science models.