I was playing on Easy and when the Scrin arrived, I purposely kept the MCV from reaching anywhere near the docks so I could kill all the Scrin invading units. After a while after the Tripods were coming, they had a Mothership coming towards my MCV. I tried finding this on various gameguides but none of them mentioned anything about a Mothership being deployed. Was this random or some sort of glitch?
Intel Core 2 Quad Q9550, Nvidia GTX275 Twin Frozr 896mb, Corsair XMS2 4gb DDR2 1066MHz, ASUS P5Q SE Plus, Corsair TX750W, Windows 7 32 Bit