Reject_666_6 said:
Telling him everything is our best bet at making an ally that isn't a manipulative, double-crossing bastard. The Emperor knows we need one right about now. If we don't get our shit together, the Nightbringer will end us before we can do anything about the situation on Mars.
In the off chance that the Lord Inquisitor decides to go full Fuklaw on us, the Deceiver will save our asses and mindwipe him - most likely in exchange for our undying allegiance. Jackal God > Changer of Ways anyway.
I would also be inclined to tell him everything. We should explain that we are doomed, and we know we are dead, but can still be of value for the Imperium. Our only goal is to keep the sector whole so that it may face the great threats swirling ever closer. We are confident we are up to this task (right guys? guys?). The easy way out is to kill ourselves. This is tantamount to surrender, dooming the sector into chaos, and failing the Imperium. Our circumstances pale in comparison to the survival of Man. There is still much to be done. Eventually, of course, we will be consumed by the halo device. We need the Lord Inquisitor to trust us, work together with us... and put us down when we spiral out of control.