EVE Zero: Ark of the Matter is a single-player adventure game in which players control two protagonists, switching between them to progress through the story and uncover connections. In this game, the storyline is set shortly before the events of Eve Burst Error, focusing on the investigations of private investigator Kojiroh Amagi and secret agent Marina as their separate cases gradually intertwine. It stands out with its dual-character gameplay, situational interaction commands, and a narrative that explores themes of mystery and intrigue without traditional puzzles, emphasizing story development and character interaction.