King's Field: The Ancient City, known in Japan as King's Field IV, is a medieval-themed first-person role playing video game produced by From Software for the PlayStation 2 in 2001. It is the fourth game in the King's Field series and the last one released for home consoles.

In the land of Heladin, something is amiss. Their king, smitten by a strange idol that was given to him as a gift, lies dying. The country was enveloped with a strange sorrow, a certain darkness that stains the soul of man. Ever since the idol was brought into the kingdom, the once prosperous nation fell into a state of corruption and decay. Fearing for the life of his king and home, the sword master Septiego took a battalion of his best men to return the idol which was believed to be the source of this tragedy. Alas, the party was neither seen nor heard from again. The idol was presumed lost forever, but the decay of the nation continued.