April 2, 2019 Knife Sisters, Update Knife Sisters will be released April 24! Our dark, explorative and erotic visual novel Knife Sisters will be released the 24th of April on Steam and Itch.io. We are so looking forward to share this interactive love story with you all! 💖 datingsim, interactivestory, knifesisters, madewithunity, visualnovel share: Fb. Tw.