CastleArena.io

About CastleArena. ioDeploy powerful buildings and units cards to destroy your opponents Castle in this fast paced strategy IO game! Create and customize your deck then upgrade your units and buildings stats to unleash powerful forces into the arena and defeat your opponent! How to Play CastleArena. ioClick and drag cards to your side of the arena or use the hotkeys 18. Choose your upgrades by clicking the arrow. CastleArena. io StrategyTry to time your attacks so your opponent will have a hard...