Since you specifically mentioned "part 6," you are likely reaching the mission where Nero faces the massive boss, .
: On Mission 09 (Genesis), you can find the actual "Secret Mission 6." You must destroy all enemies without being hit. Using V's Royal Fork skill is highly recommended here to finish enemies instantly once their health is low. Devil.May.Cry.5.Deluxe.Edition.part6.rar
: This mission is almost entirely a boss battle against a giant demonic construct. You must target the glowing weak points on its legs to make it collapse, then jump onto its back to attack the core. Since you specifically mentioned "part 6," you are
: Clearing the game on "Dante Must Die" mode unlocks Super Characters (Nero, Dante, V, and Vergil), which provide infinite Devil Trigger. : This mission is almost entirely a boss
: Before starting Mission 6, customize Nero’s loadout. Using the Hidden Power addition or specific magazines can help power up your long-range attacks like Blue Rose.
: If your version includes the DLC, Vergil is playable across all missions. You can even unlock his EX Color costume for free by performing specific feats during the credits on "Son of Sparta" difficulty.