- This page contains cultural references that can be found in Gakuen Game Neptune: Katsudou Diary.
Chapter 1: Activate, Gaministrators!
- Neptune describes a vertical shooter with a shrine maiden as the main character with a barrage of bullets coming out of her, and the boss using bombs as her special move. This is a reference to the Touhou Project franchise.
- Compa & IF's Sexy Shooter is a reference to Sexy Parodius.
Chapter 2: Invasion! The Zombie Army!
- As Vert explains the different types of action games, she mentions the following genres, with each one referencing a respective video game:
- 2D side-scroller: Super Mario Bros.
- Fighting: Street Fighter
- Games that use weapons to defeat waves of enemies: Dynasty Warriors
- The Goddesses' horror action game featuring zombies is a reference to Resident Evil.
- The planned city name "Bermuda", in which Noire mentions that it sounds like an artist's name, is a reference to Bamyuuda Saimaru, an illustrator for Hyperdimension Neptunia: Megami Tsuushin.
Chapter 3: Infiltration! Underling's Scheme!
- Neptune's idea for an RPG where the character is not interested in anything at all, and the heroine dying halfway through with a scene where she is submerged into water, are references to Final Fantasy VII.