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Fallout 3 Hints
Clear Project Purity of any remaining Mutant threat.
1 of 8: Go in using the gift shop door, then go down the hall and into the room where you shot down (or deactivated) a turret before.
2 of 8: Leave that room through its south doorway to reach the spot where you killed several super mutants before.
3 of 8: Check out the entire square-shaped hallway to make sure there aren't any more mutants in it, then find the door to the sub-basement in the hallway's southern part.
4 of 8: Head down the sub-basement's stairs to reach a large room with several super mutants in it.
5 of 8: Stay near the stairs while fighting them, and retreat back up them whenever necessary.
6 of 8: After that room is clear, find the east corridor that leads off from it.
7 of 8: Go down some stairs to find another room with mutants in it, then check the small network of rooms and hallways past it to find at least one more mutant.
8 of 8: Once that area is clear, this objective should be done. To make sure, go to the Data/Quests section of your Pip-Boy and see if you have the "Tell Dad it's safe to enter Project Purity" objective yet.
