I don't believe so. This might be a bit awkward to put together because of the wide range of formats. Some are Windows only, some are browser only (or don't work well after being downloaded) and some have multiple download formats (with or without interpreter). Someone would have to put this together after first seeking the authors' permission to do so.
From the authors' point of view, it is actually better to not have a bulk download on a site such as the IF Archive, as they can no longer see the analytics on how many people have viewed, played and/or downloaded their games.
There are other options. Perhaps Adam could put all the games together in a collection. (This is an itch.io feature.) And you can always download the games using the itch.io app, although this is a bit more cumbersome.
