User blog comment:James12708/Reapers VS. Forerunners VS. Angels from Darksiders VS. Humanity from Halo VS. Council and humanity from Mass Effect VS. Imperium of Man/@comment-50.80.96.33-20130122222343/@comment-4967682-20130123035533

Against UNSC or Covenant ships, that's going to be a one hit kill on anything but a Supercarrier. Against the Forerunners... a Forerunner battleship took a SMAC round in Halo 4 (over 50 gigatons) and kept going. I doubt those can be taken down unless the Reapers decide to 'cheat' and use relativistic kill vehicles, slamming their ships into the Forerunner ones at FTL speeds. Even then, the Reapers have no chance. There are, being generous, a million Reaper ships (capital ships, destroyers, transports, processors, and oculi included). There were over 3 million Forerunner WORLDS. Yeah. So even if the Reapers used that suicide tactic to wreck every single planet the Forerunners have, it still wouldn't come close to defeating them.