Evolutions is a "Halo Wars" style mod for Command and Conquer 3: Tiberium Wars that features epic ground and air warfare on a massive scale. Evolutions brings many instruments of war from the Halo universe to life, allowing the player to fight as the Covenant or the UNSC in epic battles based on iconic Halo locales.
The UNSC Nuclear Reactor provide power to UNSC defenses and any other critical structures, the UNSC Reactor is able to be upgraded with a second reactor to increase the power to any UNSC base and outpost.