Go to the thread store in the mall and get them while they're free (EU store as far as I'm aware)
This is the type of promotion that I like, and yes I'll be seeing the movie!
From Kotaku
G.I. Joe Establishes Base In PlayStation Home
Expect more ninja than normal in PlayStation Home starting this week, as G.I. Joe: The Rise of Cobra is set to promotionally invade Sony's social service, bringing Storm Shadow and Snake Eyes outfits with it.
The good news? They're free via Home's Threads Store and also include outfits for Duke and The Baroness. Make it snappy, wannabe Joes, as these are available to Home residents for a limited time.
Of course, that's not the only G.I. Joe advertising you'll see, as the Home Theater will add "an exclusive video welcome from stars Sienna Miller and Rachel Nichols as well as a trailer introduction from director Stephen Sommers." Sundry clips and mini-games will also satisfy your G.I. Joe cravings. Images of those costumes are after this.
