Where is God of War III set?

2010 action-adventure game

God of War III (2010): 2 real places its Wikipedia article names as the setting, in Greece. Wikidata records no setting for this game at all, so this is prose rather than a statement, and it is labelled that way below. Where the game takes place, not where it was made: a game is filmed nowhere, so this is the only kind of location it has.

Part of the God of War game series

See them on the map → Wikipedia Source data

Places per Wikipedia's Setting section

Wikipedia’s Setting section names 2 places. Each links to the sentence that says so.