There are only two notable differences to the keys in Quoth.
We have merged the models for gold and silver versions of each key design into one, thus saving another slot for model precaches.
There is also a new ‘elderkey’ design to match the episode 4 theme, since base, medieval and runic all have there own key designs. Enable this in the same way as for other keys, via the worldspawn key/value “worldtype” “3”
Touch messages and sound effects have also been added to match.