On the PSP, Knights in the Nightmare has three story lines to follow. Two are from the Nintendo DS version. A brand new one starring Princess Yggdra from Yggdra Union was made just for PSP.
When you play Yggdra mode, you see the events in Knights in the Nightmare from the perspective of Princess Yggdra. She has a more lighthearted take on the tale. During an E3 meeting, Atlus explained this feature was in the Japanese version, but needed to be unlocked with a save from the PSP game. The North American version has been updated to make Princess Yggdra’s story line available even if you didn’t play (or download a save from) Yggdra Union.
Check out the video above to see Atlus’ teaser trailer of the game at E3.