Ultimate Spider-Man

Arachnoman costume:
Complete 90 City Events, collect 90 Tokens, and complete 48 combat tours.

Black costume:
Complete 100 City Events, collect all 100 Tokens, complete all combat tours, and finish all 60 races.
Peter Parker.

Parker Hoodie costume:
Complete 75 City Events, collect 75 Tokens, and complete 32 combat tours.

Peter Parker costume:
Complete 50 City Events, collect 50 Tokens, and win the fourth race against Johnny Storm.

Spidey Wrestling costume:
Complete 30 City Events and collect 30 Tokens.

Venom races:
Complete all story mode missions.

Switch Hero option:
Complete all story mode missions to unlock the "Switch Hero" option on the pause menu.

Medium city event difficulty:
Complete 10 city events and "Inexpugnable" (Chapter 6).

Hard city event difficulty:
Complete 20 city events and "Class Trip" (Chapter 8).

Medium combat tour difficulty:
Complete 8 easy combat tours after "Hell of a Mess" (Chapter 4).

Hard combat tour difficulty:
Complete 12 medium difficulty combat tours.

Insane combat tour difficulty:
Complete all hard difficulty combat tours.

Hint: Defeating Wolverine:
As Venom, keep on pressing [Tentacle].
Kurt Meyer.

Hint: Fight Shocker again:
You can see Shocker even after you have defeated him. Sometimes in a City Event, Shocker will appear and you must fight him. It will not be a Boss battle, though -- just a fight against a street thug, who has some very powerful blasters. Note: He is also stronger than all street thugs.
Noah Baum.

Hint: See Boomerang:
Boomerang can also appear in a City Event.
Noah Baum.

Hint: Arachnoman billboard:
When you are near the Empire State Building, you will see a billboard that shows Arachnoman Note: This is one of the costumes that you can get.
Tyler.

Hint: Balloon:
In the first level available as Venom, when you feed on the kid and his balloon goes in the air, try to catch it. If you do, Venom will grab it and run around with it.

Hint: Ferris Bueller's Day Off reference:
Toward the beginning of the game where Spider-Man has to go to school (and just before the race with the Human Torch) wander around the city and explore. Spider-Man will make comments like, "I need to get to class" and "I really have to get to school." One comment is something along the lines of, "I cant miss anymore class. I've been absent nine times... nine... times." This is in reference to a scene from the movie Ferris Bueller's Day Off in which the principal is taking note of the main character's habit of skipping class.
Eric.

Hint: Comic book reference:
At the Midtown High School by Peter's house, go to the front of the school where the flag is. In front of you will be some stairs. Look at the back of the right stair rail and there will be two words written in red "GELDOFF RULES!". This is a reference to the Ultimate Spider-Man Comic Issue 27 and 28 when there is a mutant named Geldoff at the school who is a student. He nearly destroys everything but Spider-Man stops him. Also, at the same time all the other students are chanting "Geldoff rules!"
Peter Parker.

Glitch: Water walk:
Go to the tunnel that goes underwater, but do not enter. Jump on top of it on the water to water walk.
Brian J Lynch.