I have completed 68 games, but TSA only reports 61.
The missing ones in my list are:
8-Bit Adventures: The Forgotten Journey Remastered Edition
Battle Ranch
Loot Hero DX
Luminosity
Starlite: Astronaut Rescue
Tap Heroes
Two Digits
In addition, I notice it doesn't recognize my ownership of Bleed.
Also, Poof has a wrong name (showing up as InvitedPartnerApp0), here's my page for it (not sure if anyone else can access it but here goes anyway):
Twistor's achievements in InvitedPartnerApp0