Dirge of Cerberus: Final Fantasy VII

When exploring levels, the game plays like a fairly standard third-person run-and-gun adventure. But when Vincent engages the enemy, the camera shifts to a Resident Evil 4 -style "behind-the-shoulder" view, and the controls change to FPS-style aim-and-shoot. (In fact, gamers disenchanted by the default DualShock 2 control scheme can simply plug in a USB keyboard and mouse.)