his download is a self extracting installer including all you need to host and play Exterminatus - Rival Species 2. Two Species: Humans and Tyranids. Twelve distinct classes, each with their own weapons. Ten maps from the 41st millennium, each with their own missions and objectives. Beta 8.38 introduces a new Dreadnaught player class and two completely new weapons to the Tyranid arsenal, the Barbed Strangler and Devourer as well as fixing the ages old Flamer push back glitch.