Since the game is considered "abandonware" and is not available on modern digital storefronts like Steam or Epic, you must look to preservation archives:
: Third-person with "tank controls" similar to early Resident Evil titles. Druuna: Morbus Gravis Download PC Game
: Provides a Direct Download for the full 2.11 GB game. Since the game is considered "abandonware" and is
: Uses fixed camera angles and keyboard-only tank controls which can be clunky. Druuna: Morbus Gravis Download PC Game