Kumitantei: Old-School Slaughter is a unique adventure game that combines elements of investigation and card-battling within a murder-mystery setting. Players take on the role of a student trapped in an elite school where classmates are forced to kill each other as part of a twisted game. The objective is to gather clues, uncover secrets, and ultimately expose the culprits behind the chaos. The game features a retro anime aesthetic that appeals to fans of classic styles, enhancing the overall immersive experience.

As an episodic title, Kumitantei offers a structured narrative that unfolds over multiple chapters, allowing players to engage deeply with the storyline and characters. The card-battler mechanics introduce a strategic layer to the gameplay, where players must carefully choose their moves while navigating the tense environment of the school. With its engaging plot and unique blend of genres, this game provides an intriguing experience for adventure game enthusiasts.