UIFO DEFENSE HD — the gameplay, it is quite simple here and is based mainly on typical mechanics for the Tower Defense genre. That is, your main task is to defend the crystalline nuclei that are located on different bases of the human race. Waves of opponents will attack every now and again, try to get to the base and get to the goal, and you must do everything so that they fail to achieve their goal. In this you will be helped by the construction of «corridors» as such, along which enemies will move to the core, the creation of tower defense, crafting towers.