Play free game Defly.io online. Try this interesting multiplayer online game with competitive players from all over the world. In Defly .io is an awesome Helicopter Territory War Game, fly your little helicopter, built your barrier to occupy the field, shoot your enemies down to destroy their wall. You need to expand your territory to level up and upgrade your aircraft and bullets, but don't get near to your enemies, you will be crashed. Your aim is to conquer the whole map, you can choose to fight alone or do teamwork. Enjoy Defly IO! enjoy!