Quote Originally Posted by PlayStation.Blog
[...] Early on, we concluded that we wanted to build a large, open world experience — and one that featured melee combat. But beyond that we were uncertain. Pirates? Rob Roy? The Three Musketeers? All these were considered — but we kept coming back to feudal Japan and telling the story of a samurai warrior. Then one fateful fall afternoon we found a historical account of the Mongol invasion of Tsushima in 1274, and the entire vision clicked into place. [...]
Ghost of Tsushima: The road to launch – PlayStation.Blog