This is a real-time strategy tower defense game. You need to deploy your troops and obstacles to defend against enemies, and also upgrade them strategically to eliminate each wave of enemies! City Defense,tower defense game,real-time strategy,strategy game,defense game,3D tower defense,enemy defense,troop upgrade,city survival,mobile game,tactical defense,tower defense strategy,war game,action game,strategy game,tower defense,mobile strategy game,tower defense rpg