You can attempt to leave via the main door or the newly added boat escape in the sewer levels.
has incredible hearing and will rush to the source of any dropped object or creaky floorboard. granny-chapter-two-free-download-pc-game-full-version
"The addition of Grandpa makes the game much more unpredictable. You can't just rely on sound anymore because he might just walk around a corner and surprise you." You can attempt to leave via the main