The final tier. Evolved from a Drone, the Queen is the mind of the hive. She is responsible for laying the many eggs that will aid her brood in victory. She is also a capable fighter when threatened. She has the highest health of all the aliens, making her very tough to kill. Furthermore, her Paralyzing Screech ability causes nearby Marines to drop what they're holding and be frozen in place long enough for assisting aliens to take down a small squad. She also has a strong corrosive acid that allows her to open new pathways or dissolve enemy weapons quickly. She is very slow, however, making her increased health a trivial encumbrance to a squad of Marines when caught in the open.