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. Nine maps from the 41st millennium, each with their own missions and objectives. Alpha 8.63 features a new Aspiring Champion player model, chaos voices from Bulwark and updates to the CSM maps, Bunker, Garage and Thunderhawk.