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. Nineteen distinct classes, each with their own weapons. Thirteen maps from the 41st millennium, each with their own missions and objectives. Alpha 9.18 features a Chaos version of the defense map City Conflict, tweaks to the Announcer sub-system and Terminator armor code.