Not to be an ass but please for the love of the god emperor not a mass effect/40k crossover, it depends on the person investigating, the amount of cooperation, and whether or not the humans are part of the imperium.
Light coop(food/trade): Ignored for bigger opponents, Leaders+supporters killed, new governor appointed from previous leaders opponents, to all ruling class killed new leader appointed from 'liberators'.
Medium (inhabiting same system): All rulers killed along with xenos, new leader appointed from 'liberators', to everyone killed but the lowest workers.
Heavy (cohabitation and coruled): Everyone killed but lowest worker, to the capital planet bombed into ruin.
Light: Leaders and supporters killed, new leader appointed from 'liberators
Medium: All high class members killed along with xenos
Heavy: Everyone killed.
Last edited by locustgate; 05-18-14 at 10:23 PM.