By Keiichi Okabe.
I arranged this a bit over my skill level, which ended up in me having to edit out few sloppy notes:)
This is based off an arrangement that was in one of NieR's trailers (not sure if it is part of official OST?), I stayed fairly true to it in the beginning and then diversed a bit in the middle section.
MIDI files & Sheet music is available on my Patreon:
https://www.patreon.com/zakid
You can also support via PayPal:
https://www.paypal.me/themrzakid