Ways to Play is a site about games, viewable at games.porg.es.
Backing up everything on Internet Archive from the bibliography:
wget https://raw.githubusercontent.com/Porges/ways-to-play/main/bibliography.yaml -O - | grep -Poh '(?<=https://archive.org/details/)[^/]+' | sort -u > itemlist.txt
Then (from here):
wget -r -H -nc -np -nH --cut-dirs=1 -A .pdf -e robots=off -l1 -i ./itemlist.txt -B 'http://archive.org/download/'