Defly.io is a copter driving cool math game online. Your objective is to pilot a helicopter, navigate it around the war-zone and eliminate your enemies. Destroy your opponents as quickly as you can and conquer as much territory as possible. Build walls and towers to claim new territories and to protect your helicopter. If you are good enough, you can take over the entire map. There are 3 game modes to play: Free For All, Team, Defuse. Choose the server nearest to your location and start playing. Move around the map using your arrows or W,A,S,D keys. Move your mouse cursor to aim, click using your left mouse button to shoot. Build structures using your space bar or right mouse button. Customize your helicopter with almost 50 skins and 12 colors. Some of the skins need to be unlocked before you can start using them. Can you become the best copter pilot in Defly.io cool math game?