User blog comment:TheUnknown285/A very interesting image from the remake of Halo (yes, this is ME-related)/@comment-2250460-20120401033857/@comment-1388547-20120402162332

I think the Reapers would have to stop and consider before they launched an assault on the Halo 'verse. They might be able to take the Forerunners ... or then again they might not. The Forerunners have a lot of resources and regularly engage in planetary-scale engineering projects, which should be enough to give even the Reapers pause. The Forerunners also favored plasma and directed energy weapons, which kinetic barriers can't block (Collector Particle Beam notwithstanding...). On the other hand, the Reapers have indoctrination, which is much more insidious than Flood infection. It's not really clear who'd win in if they fought.

Of course, this is silly because they're different IP from different companies, but it's still fun to play with. :-)