Virus Killer-Tower Defense

This is a unique mix of high strategy and tower defense game. Features: 1.Upgrade your potion Merge the same type of potion with the same number, your potion will raise a level. But remember! Potion types change randomly when you merge them! 2. PvP Mode Apply various strategies according to enemy's map. Mix and match various potion and create your best powerful PvP map. The longer you defend, t…