Unlocking Jean Grey's Dark Phoenix Costume - X-Men Legends 2

[MUAFan88]

Hi Guys, I was just wondering if anyone knows how Jean Grey's Dark Phoenix costume is unlocked?. I hadn't noticed until today, but It's unlocked in only 1 of the many option files that I have. The other costumes in the game were unlocked after completing the first 3 acts. Iv'e completed the last two acts, but for some reason the costume still isn't unlocked. What makes this even more puzzling is the fact that everything else is unlocked in one of the aforementioned option files that i have.

[BaconWizard17]

It's most likely unlocked through some script