Control Tower’s are the very important structure types found within Darwinia that can be captured from virus control through the use of your Engineers. Control Towers typically do not exist on their own, as they have no direct function without a paired structure which is operated in conjunction with the Control Tower, although they do have a special function when it comes to research which is explained below.
Control towers are typically found attached to another building such as the others covered here. In order to capture a Radar Dish, Trunk Port or Incubator you will have to reprogram the Control Tower that it is attached to. In addition, these structures play a hidden, but very important role in furthering the player’s research projects.
Now, you would not typically know this within the game without finding this out somewhere else, as it is somewhat of a secret, but capturing Control Towers serves a secondary function of directly influencing your ability to research project items. Every time you capture a Control Tower, no matter what other item it is attached to, you will have 22 points added to your “research pool”. This research pool is drawn upon over time and applied to whichever research project you currently have Doctor Sepulveda assigned to.
It takes approximately 50 research points to go from v1.0 to v2.0, 100 points to make it from v2.0 to v3.0, and 200 points to reach v4.0 from v3.0. This means that to fully research a project, you will need 350 research points, or 16 captured control points. This is important to realize considering there is a limited number of control towers in the game, and definitely not enough to research everything completely. In the course of my own play through that lasted 6 hours and 20 minutes from start to finish, I still had about 120+ points left in my research pool, possibly more after capturing every control tower, and had spent 1850 research points. This should give a vague estimation of the amount of time it takes on a broad scale.