Kumitantei: Old-School Slaughter episode 2 launches on November 12, 2026

Developer Mango Factory and publisher Akupara Games released Episode 2 of Kumitantei: Old-School Slaughter on PC via Steam on November 12, 2026. Titled Gloomy Shojo Sunday, the new chapter follows Himari Sanada and her classmates as they explore a summer beach set inside an underground bunker. Nyanus continues to oversee the deadly setup.

Kumitantei: Old-School Slaughter · official art via IGDB

The accompanying update adds several mechanics, including Wager Battles where players can bet tokens during Free Time to earn double back against scaling opponents. A Card Shop now sits in the Prize Corner for purchasing generic skill cards and deck slots. The new Wild Card replaces five skill cards in a deck, doubles incoming damage, and grants an instant win when drawn.

Gameplay adjustments change how several minigames operate. War of Words updates the timer to count as a failure and reset instead of triggering an immediate game over when it runs out. The input window for absorbing text increases from eight frames to ten frames at 60 frames per second. White Noise spawning behavior is reworked to award points and time when destroyed. Additionally, score-to-token conversion drops from 0.5 percent to 0.25 percent after clinical trials.