I will try but someone might do a better job.
1) I'm not sure they ever mention WHERE they were made in the original Nier. Humans created them though.
2) Killing them all right as they were so close to victory was precisely the point. Every time one side is close to victory, some shit happens so that victory is prevented. The machine network and androids (I think. It might just be the network behind everything) want the war to continue endlessly because they were all programmed to fight. Without a war to fight they'll lose their reason for even existing and wouldn't know what to even do with their lives.
3) Yes the ark was created to gather all the memories of the machines that wanted fuck all to do with the endless war and send them into space.
Stahp. I have that shit memorized![]()
1- According to Grimoire Nier, which is always an important reading if you haven't done so already, androids were created in 2032 to assist the Replicant System since humans wouldn't be around to manage it. It does not say when or how they were created, though.
2 - As the game said, YoRHa was never meant to win the war, just to continue this war of attrition as long as possible. If they did win, that would mean that the "humans" in the moon, which do not exist, would need to reveal themselves. Humans in that world are treated as divine beings by the androids; exposing that the humans are dead for millennia would destroy the androids' morale.
The people that created YoRHa, and are unknown to us, would rather have war and lies than peace and hopelessness.
2.1 - The definition for logic virus, in the stage play, is:
I guess it's just a virus that affects bio-mechanical lifeforms, be they androids or machines.
YoRHa used to have a protection against the logic virus. Once they were almost winning the war, they disabled that protection (enabled the "backdoor"), allowing the logic virus to enter and mess every YoRHa android up.
3 - I have no idea, lmao. We have like 5 minutes of exposition and that's it. I think it's open for you to interpret however you want it.
The Ark was the machine collective basically seeing all the events of the game and going "Fuck it, this war is horseshit" The Tower was a big gun to shoot the moon and destroy humanity's data but after thinking about it the Machine Network decided not to keep perpetuating the war and to send the data of all the machines into space instead to hopefully reach a planet where they could just exist without the need for "gods" or, at worst, just float as data for eternity.
Nice, thanks for clearing all of this up for me!

Man, I love this game and I need more of it.