The Forunners were a technologically advanced species, capable of giving birth to sentient life even after the detonation of the Halo array. They managed to save humanity and most likely other species, but why not their own?
They didn’t go extinct…
They didn’t go extinct. They left the galaxy. And the Halo Array doesn’t “detonate”.
It was their plan to hide in the Shield Worlds but when they were betrayed by Mendicant Bias their fleets were scattered and broken. Mendicant then assaulted their lines with his fleets and the Forerunner were forced to activate the Rings prematurely. Mendicant attempted to stop them but he was held off by another AI, Offensive Bias. After he and the Flood were defeated the remaining Forerunner reseeded the Galaxy with the species they saved and then left the Galaxy to places unknown.
Lets say… it didn’t go “all according to plan” for them. The final attack was somewhat unexpected. It came earlier than they expected, most of their sheild worlds were probably unfinished (like Onyx). When thousands of ships under the command of rampant Mendicant Bias assaulted and broke through the Maginot Line, there was only one more option. The Array was, somewhat without warning, activated. Any surviving Forerunners were said to have left the galaxy, either in shame or just to start fresh.
They weren’t planning this fate.
What the last two posts said.
The Forerunners are by no means extinct, they’re just not in this galaxy. Or, as far as we know there’s no Forerunners still in this galaxy. I’ve always wondered if some of them managed to sneak into a Shield World or two, before the Halo Array was fired and the rest of the Forerunners left the galaxy.
Thanks a bundle guys! This was a real eye-opener for me.
They never left the galaxy we have know from IRIS and the encyclopedia that they just left the Orion arm.
They don’t have the technology nor did the circumstance allow them to do such a thing as leaving the galaxy.
They didn’t go extinct they left the Galaxy.
> They didn’t go extinct they left the Galaxy.
False as i have just stated. Where are you guys getting this from? Halopedia?
Why are you guys giving definitive answers?
We still don’t know. The third Bear novel might reveal all of this, or it might not.
I think that everything did not go as planned, as there is eveidence of prior battles on the Ark, and things such as empty Shield Worlds.
> > They didn’t go extinct they left the Galaxy.
>
> False as i have just stated. Where are you guys getting this from? Halopedia?
The people who believe that letting someone know that in halo 2 melee doesnt make miranda bleed and only shooting does is useful info
> > They didn’t go extinct they left the Galaxy.
>
> False as i have just stated. Where are you guys getting this from? Halopedia?
Better than Halo Nation, IMO.
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> They never left the galaxy <mark>we have know from</mark> IRIS and the encyclopedia that they just left the Orion arm.
>
> They don’t have the technology nor did the circumstance allow them to do such a thing as leaving the galaxy.
I’d trust you if you knew proper grammar.
> They don’t have the technology nor did the circumstance allow them to do such a thing as leaving the galaxy.
Where was the Ark located again? Oh it was Outside the Galaxy. The Forerunner don’t have the ability to travel to other Galaxies but they most certainly have the ability to travel around the outside of ours.
> > They didn’t go extinct they left the Galaxy.
>
> False as i have just stated. Where are you guys getting this from? Halopedia?
Halo Encyclopedia Page 171
“After the starved Flood died off, the planets were reseeded with the rescued life forms and the shattered remnants of the Forerunner civilization decided to leave the Galaxy. Their final destination and current status remain unknown.”
> > > They didn’t go extinct they left the Galaxy.
> >
> > False as i have just stated. Where are you guys getting this from? Halopedia?
>
> Better than Halo Nation, IMO.
Which still isn’t correct since that isn’t the truth so obviously isn’t not good enough.
> > They never left the galaxy <mark>we have know from</mark> IRIS and the encyclopedia that they just left the Orion arm.
> >
> > They don’t have the technology nor did the circumstance allow them to do such a thing as leaving the galaxy.
>
> I’d trust you if you knew proper grammar.
So because my keyboard doesn’t register that makes me “untrustworthy” while i gave you the sources the information came from and you could just look it up yourself?
That is what we call, stupid. So how about you give me your sources for the information you are saying so i can “trust” you? because i haven’t seen any sources in this thread even though i know all of you are using halopedia.
> P. 28
>
> 100,000 BCE
>
> The Forerunners activate the Halo Array. All sentient life in the Milky Way Galaxy is exterminated except the sampling protected on the Shield World and the Ark. Once the Flood threat is ended, the sample species are reseeded across the Galaxy, including Humans on Earth, and they begin to repopulate their homeworlds. The Forerunners leave the Orion Arm of the Galaxy.
This goes in hand with IRIS saying that this time the forerunners can not save the humans and that if they cannot defeat the flood then we are all doomed.
So please, tell me what source you were using so i can trust you since your Grammar is by far godly therefore you must be soooo reliable. I doubt you have read any books by Kurt Vonnegut If you are going to equate something as trivial as Grammar to information.
This is exactly why i keep saying “Stop using halopedia”.
> So because my keyboard doesn’t register that makes me “untrustworthy” while i gave you the sources the information came from and you could just look it up yourself?
>
> That is what we call, stupid. So how about you give me your sources for the information you are saying so i can “trust” you? because i haven’t seen any sources in this thread even though i know all of you are using halopedia.
How am I supposed to know your keyboard has problems? I’m not a magician or a psychic.
Who said I had to give a source for information. I’m just giving my 2 cents. 
Stop using halopedian… No just no, go back to your room! Bad deva! Forerunners have the ability to leave… I can’t find the quote now. Bornstellar says it. They were okay with what they had.
No they didn’t and i know exactly what you were talking about.
Seeing how Bornstellar is a 12 year old forerunner that was proven wrong with every single point he had and then later questions the authenticity of the forerunners legacy i really wouldn’t be using that as an example. If they could leave the galaxy they would be tier 0 not 1.
> If they could leave the galaxy they would be tier 0 not 1.
No, if they could travel to other Galaxies they would be Tier 0.
Halo Cryptum Page 116
“We were satisfied with the resources of this galaxy, for the time being and rarely looked outward. So I had been taught. But, as the Didact was so quick to point out, there are many things Builders do not teach their young.”
The Ark, as well as the Greater Ark, are both clearly outside the Galaxy and both have the ability to sustain life. “Leaving the Galaxy” doesn’t mean they moved to another one, it means they simply left. They could easily be living on a construct somewhere in the void, overlooking the Milky Way.