flood lose because....out of the entire armies in supcom only ACU's and SCU's have human pilots....supcom forces evacuate civillians, build up with ACU and recall ACU....flood have no biomass to consume and die off.

What now?

Flood alter the atmosphere, leaving spores to be carried around through the air.

Considering a Mech Marine is bigger then a tall tree, I fail to see how the Flood could be a problem...And with it being a robot, it couldnt really be converted...

Yeah, the civ population would get infected and turn into the army, yada yada, but as I remember from SupCom, the civ population is very small.

And Plus...I mean cmon, one cerberus would be enough to hold the line from thousands of flood.