Underworld 4 is the twenty-ninth level in Global Defense Force and its port, Earth Defense Force 2: Invaders From Planet Space. The full-scale attack on the Buggernaut nest beneath an unspecified town reaches its apex as several teams make it to the queen's chamber. The Buggernauts have become desperate. Ultimately, this is the most successful of all similar missions in the series; although suffering the typical 50% casualties that come with these mission sets, the queen here is perhaps the easiest occurrence to battle against, and an actual nest gets eliminated.