This page is rather stubbly and could use some expansion. Are you a bad enough dude to rescue this article?
To do:
Cover the Debug menus. The GoG version added a debug executable on accident if you update with GoG Galaxy.
Create a LOG folder in the installation folder for it to work.
Look for other leftovers from mk2 in the Playstation Vita version
Hyperdimension Neptunia Re;Birth2: Sisters Generation is a remake of the second game in the Neptunia series, Hyperdimension Neptunia mk2. While most of the story remains the same, sans a few Maker characters who were replaced with others, it features characters from the previous Re;Birth game, playable Oracles and an exclusive "Holy Sword" route.
The Playstation Vita version of the game has leftover music from Hyperdimension Neptunia mk2. The audio files are the exact same size and length as the original game's so it's likely an oversight from the developers porting the game assets to the Vita.
This debug menu appears if you open the executable called: NeptuniaReBirth2_do_NS.exe in the GOG version of the game and most of the settings cause the game to crash.