I originally posted this as it relates to the DOD1.3 novella, but I’ve continued to edit and add to this as more and more aspects come to light.
The original timeline was published in the DOD3 Complete Guide, then scanned and edited by me. Please feel free to use this image as you wish–but I would greatly appreciate the credit for putting it together. The actual PSD file is almost 150MB worth of details and layers and many hours of work and research.
Also, try not to get bent out of shape to see that this image does not designate any specific shift in worlds between the DOD universe and NieR. Interestingly enough, no where in the giant DOD/NieR timeline printed in the DOD 10th Anniversary -World Inside- book does it state any sort of jump to a parallel universe or other dimension. It merely continues through the course of time and shows how things potentially flow together. You may take that as you will.
Addendum: I understand that there was a discrepancy relating to DOD2 and where the novella “The Garden of Light” ought to be; however, I have kept the timeline as it was printed. If you feel that I ought to edit this to reflect where the novella should be, please let me know. My memory of DOD2 is very old, since I only played it once over ten years ago. If I get a lot of comments to edit this, I will.