- last post: 01.01.0001 12:00 AM PDT
I was under the theoretical assumption that the Forerunner first came upon the Flood infection forms as free-floating organisms within Threshold's atmosphere. Curious, they built a separate facility to study them. Unfortunately, the Flood got out of had and spreaded throughout the facility as evidence of a slaughter is apparent through the faded blood pools and splatters throughout the station. The surviving Forerunner sought refuge in the lower levels of the station, and perhaps failed at attempting to cut loose the station. However, a few may have escaped-the Flood also found means of escape, free to plague the galaxy. Suffering loss after loss of entire planets either to the Flood or attempting to quarantine the spread, the Halos were being constructed as the war rages on. Perhaps the Flood spreaded to the worlds of the aliens that presently form the Covenant. Either they blamed the Forerunner for the Flood and/or the Forerunner began to destroy their worlds to try to save what they can. Either way, the aliens must've banded together in a coalition to wage war against the Forerunner. The epic war ends with the Halos being fired.
Or perhaps the Flood was indeed secretly engineered at the facility and a opposing strike team was covertly sent in based on intel to kill everything they see. I always have this gut feeling history repeats itself in Halo.
If I remember correctly and I may be wrong(correct me if I am), didn't the novel say that the Flood wasn't created?
Nevertheless, Halo is a weapon despite whatever relevance the Flood may have to be some sort of bio-weapon. And it'd be a damn good bioweapon at that. Who were the Forerunner's enemies, provided they were attempting to develop this..bioweapon? Well, now we know the Flood is indeed capable of evolution in Halo 2. The Flood controlled Pelicans, they're not so much as driven by Flood forms, as it's piloted by this bulbous Flood growth over the cockpit.
[Edited on 6/15/2006]