New Vegas Also Had The Decency Of Not Mandating A Jesus Allegory For An Ending Unless You Bought DLC Which Made It Not Even Matter By Then - Tumblr Posts

Fallout 3: We filled the vault with spooky drugs that drove everyone insane! OOOOOOOO!

Fallout New Vegas: The vault is abandoned by its people, having followed their orders to kill their own down to the last man, only to find they were supposed to reject this cycle to begin with. Something intended to only last a few days lasted centuries, and in the end the survivors kill each other out of disgust for what they’ve done. You find what remains.

Fallout 4: DRUG ABUSE VAULT! YAY!