PlayStation Vita gets a Disgaea game at launch, but it's not totally original. Buyers of Disgaea 3 Return might have played the original Disgaea 3 on the PlayStation 3. For these players, Nippon Ichi shared today a handy little tip (or trick, or "easter egg" as they used to call it).
If you want to play Return's new scenarios immediately, you'll need to use the "Nippon Ichi Command." At the title screen, move the cursor to continue ("つづきから") and enter: triangle, square, x, triangle, square, x, circle.
You'll know you were successful when you hear Mao's voice. Select either new game or continue, and speak to the character shown in the below screenshot, and you'll gain immediate access to the new Vita content and and content that was released to the PS3 as download content.