Here's a hook: A vital forge world of the Imperium has just repelled a Chaos Marine assault and, as more and more greenskins flock to the system under his banner, a cunning Warboss sends a crack commando team (you) of Ork nobz and two mekboyz to hijack the newly completed Titan "Astreus." Warboss Grekkanid knows he is on the verge of a Waaagh, and if the Titan is destroyed, the swelling green tide will turn into a massive tidal wave of Ork energy that will plunge the system into bloody chaos. The mission will be brutal and you all will die, but how you die is important: only if you die in enough glorious ways will the psychic power overflow and generate the momentum needed to start the glorious Grekkanid Waaagh!