You're browsing the GameFAQs Message Boards as a guest. Sign Up for free (or Log In if you already have an account) to be able to post messages, change how messages are displayed, and view media in posts.
For 10 of them, you need to collect a certain amount of NP total (usually at 10000 point intervals, but the last requires 99999 points total). For the 11th, you have to input a password. Both of these tasks are done by going to "Tree of Guts" mode (in between story and wireless modes, I think).
"No matter how far a jackass travels, it won't come back a horse." Batou; Ghost in the Shell 2: Innocence