Spider-Man Edge of Time

There are many costumes to unlock in Edge of Time, if you have a save file from Shattered Dimensions on you harddrive you will unlock some costumes from that game, clearly these are not related to getting the cheeve, You can also enter some vip unlock codes to unlock one of the coolest costumes in the game, again these are not tied to the achievement, and entering codes from these DOES NOT affect unlocking achievements.
For the achievement you will need to earn keys by completing challenges in the "web of challenges" to silver medal or better, once earned you go into the bonus gallery, then into alternate costumes, and choose the costume you wish to unlock, all costumes avalible are visible from the start tho they are locked out,
This is where most of your costumes will be earned, the rest are unlocked with natural story progression.

VIP unlock codes
Go to vip unlock codes in the menu and enter:

Poison(imo the coolest in the game) - innerspider

The Last Spiderman or amazing s/man #500 - laststand

This last code i think was a Russian code but it worked for me - coldhearted