These are games that challenge you to deduce what is happening and how to solve puzzles with your knowledge, recall and logical reasoning in different ways. Whether using clues to solve a crime, deducing the right numbers in a sequence or working out how words fit together, the joy of these games is that they get your grey matter working.
This includes recent games like Obra Dinn and Case of the Golden Idol, but also long-standing crime-solving and point and click style games.