--War & Wonders-- Tower defense games are full of fun, strategy and challenges! Whether you are a rookie or a master of tower defense, Top Defense will bring you a great experience! --Merge to Upgrade-- Whether it's a building or a turret, just merge them to upgrade! Top Defense is an innovative strategy game with a "Merge to Upgrade" function, no longer need to wait for a longer upgrade time, just merge the two to complete the upgrade immediately! --Assemble your Army-- The land, the navy,