You can legally download the Yaiba: Ninja Gaiden Z prequel comic for free from Dark Horse Console (Physical): For PlayStation 3 Go to product viewer dialog for this item.
You can download the official version via Steam , where it often goes on sale for as low as $2.99. Yaiba: Ninja Gaiden Z DescДѓrcare gratuitДѓ
While the full game is not officially free, it is frequently available at steep discounts or in physical formats: You can legally download the Yaiba: Ninja Gaiden