The game is an advanced Tower Defense title. To defend yourself from a stream of enemies, you need to collect randomly created Turrets and set them up. To be most effective, it is required to combine different Turret types in different variations. While doing so, you level up, spend talent and ability points to unlock different bonuses. You aquire new Turrets by collecting them from enemies, buying them or through crafting. While there is a campain available, it is possible to create an unlimited amount of maps by using the built-in Map Editor. In addition, you may assemble challenging invasions, that spawn on your map at specific moments and yield additional rewards.