Vault 74

Vault 74 is a vault that the bethsoft creators made for the official geck tutorials. It is a simple vault with an atrium, a clinic, and an overseer's office. Not much is know about the vault except that it was overrun by raiders. You can download the vault for Fallout 3 PC here. The Vault comes with a simple quest called Exploring Vault 74. You start the quest by simply entering the vault and you complete the quest by reaching the overseer's office.