The Wrath of the Lamb Add-on for The Binding of Isaac has 32 achievements.
Complete Challenge 4
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Complete the final chapter with Cain
Kill moms heart with Samson
Complete the final chapter with Isaac
Complete the final chapter with Maggy
Complete the final chapter with Judas
Complete the final chapter with Eve
Complete the final chapter with ???
Complete the final chapter with Samson
Kill Satan with Samson
100% the game
Kill mom but pass on 2 treasure room items
Complete Challenge 3
Complete Challenge 1
Complete Challenge 2
Complete Challenge 6
Complete Challenge 5
Complete Challenge 7
Complete Challenge 8
Complete Challenge 9