When uploading images please be sure to categorize them as appropriate.
All official images go under either the artwork or screenshots category for their respective source (for example Category:Neptunia Victory artwork and Category:Neptunia Victory screenshots). For games with not a lot of images to them, just use the game (images) rather than dividing them into artwork and screenshots.
All official images of character go under the category for that character, while fanart goes under the character's name followed by (fanart). Example of this is Category:Neptune for official images, and Category:Neptune (fanart) for fanart.