Construct a variety of defense towers, collect strange and wonderful functional buildings, and resist waves of fierce monsters attacking the city. Ding, your super beast trap successfully captured an elite monster from the attacking monsters. Ding, using the tower transformation talent, your basic arrow tower has mutated into a basic sword tower. Ding, the number of enemies killed by your splash tower has exceeded one billion, automatically upgrading to a nuclear bomb annihilation tower! Ding, achieving hidden conditions, your electromagnetic tower and aurora radio tower can be merged into a plasma spark tower... Endless world, no...