Searching for a "full version PC download" of Sengoku Basara 3 (known as Sengoku Basara: Samurai Heroes

Since there is no direct PC install, players use emulators to run the console versions of the game:

: Mitsunari Ishida, Hideyoshi’s loyal retainer, swears absolute revenge against Ieyasu, splitting the nation's warriors into the Eastern and Western Armies. Playing on PC (Working Methods)

The game is not officially available on PC, but you can use a Japanese version of the game, which can be emulated or played through a compatibility layer. Here's a step-by-step guide: