Defly.io is a multiplayer territory capturing game where you are a helicopter, and the goal is to get as much score as possible by expanding your territory or killing other players. You can place a dot then a line will show the line that would be created by placing another dot connecting the 2 dots. If you go too far away from your last dot the line will disappear and you can no longer create a line between the 2. Connecting dots around an area and connecting it will capture the area within your lines. You can shoot other players' dots to destroy the dot and all lines connected to it. Shooting a line will just bounce the bullet away. Shooting another player will kill them and remove all of their dots and lines. Gaining enough score will give you points to put towards upgrading your helicopter or dots as well as increase your level. Once you reach a high enough level you will be able to choose an ability to have until you die. Each ability has a cooldown after being used.