The search features of Nitter are invaluable. Goodness me, how I wished to have Nitter become active again when I decided to look into the development of Kubinashi Recollection.
But anyway, I been looking at your Lost Media list @vanyk, and I think some formatting changes is needed.
Rediscovered lost media can be separated to its own category. If one of the goals of this thread is to find lost media, then it should be easy to look at the Lost Media list and figure out which lost media needs research.
My other concern is the inclusion of 日陰サバイバン (Phoenix Wright x Touhou game) or as HakanaiBlue's English translation calls it, Shady Trial. I can't see how this work be considered lost media since it can be easily be found on DLsite, which is also the main method HakanaiBlue recommends to buy the game. Simply put, I don't see how this media could be considered lost at any point in time.