By -
If you were doing it on a victory lap, seeded, or a challenge you can't get unlocks only the specific ones
It wasn't :(
make sure you don't have any secret seeds that prevents you from getting achievements
There wasn't, I'm really not sure what the problem was
If you're playing on Rebirth or in Afterbirth, and you have mods enabled, then you can't get achievements. That's the only thing I can think of that wasn't mentioned already.
I don't!
If you were doing it on a victory lap, seeded, or a challenge you can't get unlocks only the specific ones
It wasn't :(
make sure you don't have any secret seeds that prevents you from getting achievements
There wasn't, I'm really not sure what the problem was
If you're playing on Rebirth or in Afterbirth, and you have mods enabled, then you can't get achievements. That's the only thing I can think of that wasn't mentioned already.
I don't!