Quiz Oyashiro Shock (クイズ オヤシロショック) is a minigame featured in Higurashi no Naku Koro ni Sui. It is a quiz game where players have 60 seconds to answer 10 random questions about various trivia related to the entire Higurashi no Naku Koro ni franchise. Doing well in the game allows players to unlock new arcs early and art galleries. Sui features 4 levels of difficulty.
Higurashi no Naku Koro ni Hou features an expanded version titled Quiz Shin Oyashiro Shock (クイズ 真オヤシロショック, lit. Quiz True Oyashiro Shock), featuring new difficulty levels and additional questions based on the new content included in that port.
As these questions ask about many details about the entire Higurashi series, including the extra arcs and Advanced Story, caution is advised.