Trivia / Black Market of Bulletphilia ~ 100th Black Market

• Milestone Celebration: The game is meant to celebrate the 100th Comiket convention in August 2022. It also ended up falling on the 20th anniversary of Embodiment of Scarlet Devil, and the 25th of Highly Responsive to Prayers, making it act as one to the franchise in general.
• Permanent Placeholder: "Lunatic Dreamer", which was previously a part of Violet Detector's soundtrack, reappears as the tutorial theme. According to the music comment, ZUN had originally intended to use the song as a placeholder for the game's test version, but he found it fitting enough that he decided to keep it in the final product.