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About Kumitantei: Old-School Slaughter
Kumitantei™: Old‑School Slaughter is an episodic murder‑mystery adventure card‑battler that blends retro anime horror with a high‑stakes killing‑game premise. Six episodes begin releasing in early 2026, placing sixteen elite Absolute Students in a 1989‑era Japanese bunker where they must survive an Apathy Experiment.
The game mixes visual‑novel storytelling, detective investigation, and deck‑building combat. Players bond with classmates to earn powerful cards, examine crime scenes for evidence, and argue in courtroom‑style trials that echo Ace Attorney and Danganronpa. It runs on Windows and includes Steam features such as Cloud saves and achievements.
01 / THE GUIDE
Story & Setting
The narrative unfolds in a decaying bunker set in an alternate 1989 Japan. Sixteen Absolute Students awaken to a kill‑or‑be‑killed experiment, forcing them to uncover secrets while confronting their humanity.
Visual inspiration comes from Rumiko Takahashi’s Urusei Yatsura and 1980s anime, giving the game a creepy‑cute aesthetic that frames each episode’s mystery and reinforces the retro horror atmosphere.
- Observe the bunker’s details; visual cues often hint at hidden story elements.
- Compare episode introductions to spot recurring thematic motifs.
02 / THE GUIDE
Deckbuilding & Combos
Players collect cards from the bunker and through class bonding, then arrange them into decks that enable “absolute combos” during debates and trials. Card synergy determines the strength of arguments and outcomes.
Deck construction is central to progression; finding new cards expands strategic options, allowing players to tailor their approach to each courtroom challenge.
- Experiment with different card pairings to discover effective combos.
- Track which cards unlock after bonding for future deck upgrades.
03 / THE GUIDE
Investigation & Trials
The game requires players to investigate grisly murder scenes, gathering evidence that is later presented in trial sequences. These trials function like Ace Attorney confrontations, where cutting through lies determines survival.
Trials can end in bloodshed for the culprit or all participants, emphasizing the high stakes of each courtroom showdown.
- Take notes on evidence locations; they often become trial focal points.
- Pay close attention during trials to identify logical gaps in the opposition’s argument.
04 / THE GUIDE
Bonding & Gifts
Interacting with classmates—listening, gifting, and conversing—deepens relationships and yields powerful cards for use in debates. These bonds act as a resource for expanding the player’s deck.
Bonding with different classmates adds variety to deck composition and encourages narrative engagement.
- Prioritize gifting to characters whose cards complement your existing deck.
- Listen to classmates as part of bonding to receive powerful cards for debates.
05 / THE GUIDE
Retro Arcade Mini‑Games
Beyond the main narrative, the title includes arcade‑style mini‑games that reference classic old‑school arcade icons. These segments test retro gaming skills as faithfully crafted riffs on old-school arcade icons.
The mini‑games serve as a nostalgic diversion, reinforcing the game’s homage to 80s arcade culture while offering optional challenges.
- Practice the mini‑games early to become comfortable with their timing.
- Observe patterns in arcade challenges to improve your retro gaming performance.
COMMUNITY
Player discussion