Thanks, both of you, for explaining what happened. I did first seek out that Wiki page that lists all the games removed, but I believe it contains only games and not movies, which is why I decided to post here. If there is a version of that wiki list that shows the movies can you point that out as I had trouble finding one.
The GOG Wiki is pretty much wholly abandoned at this point. I think the removed games list was the last page that was being kept up to date, and Grargar gave up the ghost on that back in about February. (Since then, there's also been a warning by the guy that runs the wiki that the site might go away at some point, though for now it's still up and, last time Grargar tried, editable.)
I know of no other equivalent list; this thread, unfortunately, is the best we've got for now, until and unless someone else tasks themselves with making a proper, up-to-date chronicle (and at this point, I doubt it will be me).
On a side note: per chance do either of you know where else those movies can be acquired? Watching those were on my to-do list, and I got the first part when it was given out for free a number of years ago, but I did not want to start until I got the entire set, and with parts 2 - 5 no longer on GOG I am now discouraged from starting since I will not get the complete story. :-(
First off: I haven't seen any other than the first film, but it's my understanding that not all of them are related to earlier entries in the series in terms of characters or story; some (maybe most) are just kind of "thematic sequels", using the "The Gamers" name and trafficking in the same types of humor and concepts. So you shouldn't expect anything like a single, coherent meta-plot thread running through the whole series.
With regard to finding a place to purchase the films: [search engine of choice
] is your friend. =) I imagine the discs are available on Amazon.
The price may not be great, but the Zombie Orpheus website
would be a place to check...though I don't know about the DRM-freedom of their store's digital downloads, so if you specifically want to buy just unfettered video files to download, that might be a taller order. (One would hope that, since they sold them DRM-free through GOG, they would do so through their "official" web store, too.)
I know at least some of the earlier films are available in full on YouTube, and have been for years; I've had Dorkness Rising
(the second film) languishing in my "watch later" playlist for at least a couple years now, and I first watched the original there, as well.