Collections and packages

[Karl Berry]

In addition to the other answers, if you like running Unix commands
instead of "front ends" ...

    How can I query which collections I have installed? 

tlpdb=/usr/local/texlive/2020/tlpkg/texlive.tlpdb # or whatever

grep '^name collection-' $tlpdb

    How can I query which packages belong to a certain collection?

sed -n '/^name collection-games/,/^$/p' $tlpdb | grep '^depend '

Happy querying,
Karl