Unlock Arena Mode
Complete the game to unlock Arena mode under the extras option.
Unlock Black Suit
Defeat Venom at the grand finale mission to get the Black Spiderman Suit as a unlockable. You’ll be able to switch between the black and regular red suits at any time.
Unlock New Goblin Playable Character
Beat New Goblin/Harry to unlock him as a playable character. You can control his hover board using motion sensing.
Note: This is only available in the Collector’s Edition of Spider-Man 3.