Dupl.io is a strategic territory conquering io game. Duplicate your tiles to overwhelm and capture other players. Try to conquer the entire map! How to Play dupl.io Simply click your blocks (white dots) to grow them and expand in all 4 directions. Growth is limited to once per second to give you some time to plan your next attack. Expand onto enemy tiles to capture them. Try to capture level 4 tiles to cause a chain reaction!