U HexArena.io You have to expand your territory and send your army to conquer the main castle and areas of the enemy. Hexarena.io lets you use strategy and tactics to build yourself an entire empire inside a hexagon-shaped arena. It's fun to try this new IO game online with lots of players from all over the world. You will be competing against them in an epic battle, so get ready to show off your skills. You need good tactics and strategy to build empires inside the hexagon-shaped arena. You'll go through the map looking for as many tiles as possible by buying or picking up armies that you send from structures. These armies will help you capture your opponent's main castle and territories. Do your best to take over the most areas in the game HexArena.io to become the best player on the server.