This download is a self extracting installer including all you need to host and play Exterminatus - Rival Species 2. Three Species: Imperium, Tyranids and Chaos. Eighteen distinct classes, each with their own weapons. Eleven maps from the 41st millennium, each with their own missions and objectives. Beta 9 - Release Candidate 3, features a new chaotic, version of the Orbital space station map and yet another updated version of csm_trench.