I have 95/97 secrets and a full collection of 198 items. Click to embiggen:
All the achievements and secrets I'm now missing are AFAIK (and astats.nl confirms):
- Spelunker Boy
- Mama's Boy
- Platinum God
But as we know, Spelunker Boy and Mama's Boy are not required for Platinum God.
So… what am I missing? Why do I not have Platinum God?
Best Answer
AFAIK, you do now need all secrets per the developer:
This appears to supersede the answer that you found.