Unlock the following characters by pressing the corresponding sequences of buttons while on the Helicarrier:

CHARACTER - HOW TO UNLOCK
New Goblin - LEFT, DOWN, RIGHT(2), DOWN, LEFT.
Sandman - RIGHT(3), UP, DOWN, LEFT.
Venom - LEFT(2), RIGHT, UP, DOWN(2).

To receive 5,000 upgrade points, while you are standing on the Helicarrier press Up(2), Down(2), Left, Right. Note: Enabling this code will disable the earning of achievements:

Unlock the following characters by performing the corresponding tasks:

CHARACTER - HOW TO UNLOCK
Black Cat - Beat Toyko level 1.
Blade - Beat Transylvania level 2.
Doc Ock - Defeat him in Tokyo level 2.
Green goblin - Defeat him in Tokyo level 4.
Iron Fist - Beat Tangaroa island Level 3.
Lizard - Beat Cairo level 2.
New Goblin - Beat the game.
Rhino - Defeat him in Tangaroa Island level 4.
Sandman - Defeat him in Cairo level 4.
Scorpion - Defeat him in Tangaroa island level 2.
Venom - Defeat him in Transylvania level 4.

After you first meet Bubble-Man, you can activate the Black Suit Spider-Man at the Helicarrier.

When fighting the Green Goblin, he will throw pumpkin grenades at you. Change characters while he is throwing to make the grenades explode in mid-air.

ACHIEVEMENT - HOW TO UNLOCK
Tokyo Complete (125 points) - Find all collectibles and secrets, and defeat all bosses in this location.
Tangaroa Island Complete (125 points) - Find all collectibles and secrets, and defeat all bosses in this location.
Egypt Complete (125 points) - Find all collectibles and secrets, and defeat all bosses in this location.
Transylvania Complete (125 points) - Find all collectibles and secrets, and defeat all bosses in this location.
Nepal Complete (125 points) - Find all collectibles and secrets, and defeat all bosses in this location.
Lightning Strikes (25 points) - Get a Hit Chain higher than 15.
Combo Meter Master (25 points) - Fill the Combo Meter all the way to Level 4.
Our Powers Combined (25 points) - Initiate a Hero Strike Power-Up.
Web Slinger (75 points) - Fully upgrade Web Line with all available Modifications.
Arachnid Artillery (75 points) - Fully upgrade Web Shoot with all available Abilities and Mods.
All Tied Up (75 points) - Fully upgrade Web Stun with all available Abilities and Mods.
Fury's Fourteen (75 points) - Fully upgrade all characters with all Attacks and Attributes.