@denizelifs For new purchases, as in ones that occurred after the CD keys were no longer provided, there's unfortunately no way to get the key from Steam. If you bought before the change happened around February, you might still technically have a key on your account, in which case you might be able to convince Steam support to provide it to you.
If that doesn't work, or you bought the key after the change, you'll need to contact EA customer support and ask for help. Be sure to provide proof of purchase from Steam, e.g. screenshots of a digital receipt and the game in your account; you can upload these screenshots when you submit the help request.
I bought it in 2019. Previously I was able to view my key. I can't view it right now and I've already contacted Steam. They redirected to EA. If I can't access my key again and there is a way to connect my Origin and Steam account, I want to do it. Thank you for trying to help.
@denizelifs Do you currently have the game installed, and was it most recently installed before the change happened? If so, you can dig the product key out of the registry. It'll be in one of these two locations:
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Sims(Steam)
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Electronic ArtsSims(Steam)
I deleted the game before and hadn't played for a while. After a while of reinstalling I realized that the key was not there. By the way, I have linked my Steam and Origin account now. I just have to import The Sims 3 into Origin.
