IMPORTANT ANNOUNCEMENT:
I am currently working on creating a much better website to host all this information. As such, I will not be properly adding content past Version 6.6/Luna VII to this website as that will all be present in the better version (I've left a concise summary of all content since then on the last page). Once the better website is completed, I will provide a link to it for anyone who is currently using this. Apologies for the delay, but creating a proper website takes quite a long time.
The new website will hopefully have a much better and more interactive UI, and be easier to navigate. I'm also trying to get bits and pieces of the lore incorporated as I build it, and give it a better appearance. I was surprised to see that people actually managed to find this website since I didn't do a significant amount of promotion for it, so sorry for not letting you guys know earlier!
UPDATE #2 (I deleted #1 because it isn't really important to keep here): I don't want to make any promises on when I'll be done with the website because it is a lot more work than I had originally anticipated. On top of that, I've also been working on a flowchart that will hopefully be easier to use than both websites, so I've had a lot on my plate (on top of the fact that I have real life obligations too). It may still be a while before I can release anything, but I want you all to know that I am still here and will continue to update the black box on the last page until I am able to properly get things out.
Event: Of Drink-A-Dreaming
Version 2.5 Event
This is not a flagship event, just a smaller event that occurred during this patch
Event: Hidden Strife
Version 2.8 Event
This event introduced Diluc's alternate outfit
Event: A Study in Potions
Version 2.4 Event
This event is unvoiced and does not feature playable characters. However, it introduces a new plotline that will be referenced in the future so it is still worth checking out
Tumult Subduer
If you've managed to avoid this quest until now, then congratulations! It's finally safe to do
This quest technically released in Version 5.7, but there really isn't any reason to put it off until then
This quest unlocks an endgame mode, so don't worry about it if you are unable to clear parts of it. It is only really here for its story
Event: Summertime Odyssey
Version 2.8 Flagship Event
For the second summer event, we had a return of the Golden Apple Archipelago! Things are looking a little different over there though, so it's definitely worth checking out
There were also two voiced World Quests limited to these areas