Powinienem był to wiedzieć! - Gra typu quiz o rzeczach, które powinieneś wiedzieć

...I should have known that! is an addictively entertaining trivia game with over 400 questions about things that you should know. In contrast to traditional trivia formats, you don’t receive points for answering questions correctly. Instead, points are subtracted for every incorrect answer! One thing is for sure: it will only be a matter of time before you hear yourself say… Doh!... I should have known that!