Nothing yet. This was posted on May 7th:
Replenishment of inventory will vary from region to region. We will start fulfilling reservations next week in the US / Canada, and UK / EU / AU in the following weeks.
So I'm guessing those of us outside North America will have to wait a while...
You can use protondb.com to look up those games to see if they work using Steam's Proton compatibility layer.
The Sims 3 worked for me but just make sure it's installed on the same drive as Steam or it may not work properly. The launcher sometimes didn't work either but there are workarounds for that.