Yukyu Gensokyouku 3 Perpetual Blue is an adventure rpg game that is the third and latest one in the Yukyu Gensokyouku series for the Dreamcast. The game most of the time is choose between different actions or answers to advance in one direction or another. That adventure part is made in a first person perspective.

The other part of the game is made in a third person perspective since the player's character can walk around buildings and other places, and the same for the battle part that is made in a third person perspective. Instead of the medieval theme that was in the other games in the series this third instalment is the modern world and features some members of a bureau that fights against magic monsters.