You can use an existing time tested turret or a new weapon. It's up to you to decide how to spend the budget. You can build a new turret, or upgrade and reinforce the existing turret. The turret is different in attack range, firing speed and damage type. Winning is the only method will integrate different turrets, allowing them to coordinate with each other, mutually reinforcing.
Each player can get a lot of fun from the game through a flexible difficulty setting. If you are an experienced commander, you would like to have a hard time and a limited amount of time, where a moment can determine the success or failure of the war, and everything depends on your ability to choose and arrange the wisdom of the turret. If you are a beginner, you can easily train and be prepared for the rigors of war.
No matter what type of player you are, well thought out maps and a variety of turrets will provide you with unlimited tactical options. Stunning detailed background of the game, painstakingly drawn turrets, and unbelievable effects, you can not be part-time eyes away from the screen.