An Alfa System and Sony Computer Entertainment PlayStation 2 exclusive adventure game

Kenran Butou Sai (絢爛舞踏祭), translates to "The Mars Daybreak", is a real-time simulation adventure game published in Japan by Sony Computer Entertainment for the PlayStation 2 on July 7, 2005. The title is a spiritual successor to Gunparade March containing the same style of hybrid gameplay where the player interacts with AI controlled NPCs and then participates in combat segments with them. Sony's Prokion and Alfa System developed Kenran Butou Sai with the title being a part of the studio's larger interconnected universe known as Unkown World.

A television anime based off the world of Kenran Butou Sai, but focusing on a different story and characters, aired a year before the game's launch in 2004 called Mars Daybreak. The show was produced by Bones and was later released in North America by Bandai Entertainment in 2006.