The Broken Dreams Vault is the storage area where Dexter catalogs all of his failed and destroyed inventions, many of which met their end at the hands of Dee Dee. It made its only appearance in the first issue of the Dexter's Laboratory IDW Comic.
- Ultrabot 2000
- Dynomutt X-90
- Parrot Robot
- Robo-Dexo 3000's head and right hand
- The Porto Lab's Shrink Ray
- An older version of Dexter's Time Machine
- An older version of the Dexo-Transformer
- Dexter's formula for Maximum Brain Potency
- The access code for this area is "Dee 9'D".