I just beat the last Rebirth challenge, #7 Suicide King, and got the Suicide King Achievement. I waited. And waited... No Platinum God?
I looked back at my Steam achievements to see that I had all of them up to Platinum God, and others beyond (Dark Baby, Blinding Baby, Eden's blessing, etc.). Puzzled, I went back to the game stats, and under items, I was missing like 15 of them on the first three pages. Why?
I had unlocked all of their achievements, even picked up all of the missing items in runs (Missing No., Razor Blade, Forget-Me-Now, Epic Fetus just to name a few), but they didn't show up in my items page!
Nope, no seeds. And I've gotten all of them I'm pretty sure. Also, to check, one of the missing items was Guardian Angel (Which I've gotten) and so I started a Maggie run. I beat Satan and The Lamb (Thanks to Death's Touch, Continuum, Guppy) and no achievements appeared or anything. I then went to my items list again to find that it's still not there!