Some of those older cd keys can be activated on steam and origin.
steam used to have a list can't find it atm just this info: https://help.steampowered.com/en/faqs/view/0E71-0971-324A-1161#which
Edit: Found an archive of steam page with list of old retail keys that may active on steam...
One major component missing from that list.
CPU cooler or AIO
i7 = No thermal solution included
No suggestions here just making sure it's not an oversight!
Time for a small purge.
6BBLR-ZZ487-327DZ Glorkian Warrior
XMLL6-KIE6P-89H3J Giana Sisters: Twisted Dreams
408Z7-XRCQR-GYV4N Deadly 30
6WJHB-BPILQ-VMVAT Divekick
0VXMG-DIAD4-D8ANJ Divekick
If anyone wants it cheaper it's
$16.99 and $21.24 on Fanatical https://www.fanatical.com/en/game/persona-4-golden
https://www.fanatical.com/en/game/persona-4-golden-digital-deluxe-edition