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 8.68 add the final a new chaos player model, the Raptor class. 8.68 also comes with some map bug fixes and a number of other tweaks as the development team move toward a new balancing and polishing phase.