The final achievement of the Fallout 3 downloadable mission pack The Pitt requires the player to collect 100 steel ingots which are hidden around the destroyed city of Pittsburgh, Pennsylvania.IGN: The Pitt Hands-On (February 19)

1. Into The Pitt - Unlocked by completing the "Into The Pitt" story
2. Unsafe Working Conditions - Unlocked by completing the "Unsafe Working Conditions" story
3. Free Labor - Unlocked by completing the "Free Labor" story
4. Millworker - Unlocked by collecting all 100 steel ignots

Developer Bethesda has promised there will be a total of three additional story packs to further flesh out the story of Fallout 3. The first of which was Operation Anchorage, which focused heavily on heavy action and a large amount of combat.

The second, The Pitt is meant primarily to engage the player with more story and branching objectives than in Operation Anchorage.

The third and final pack is called "Broken Steel" and allegedly alters the original ending of the game and puts the player in charge of ridding the countryside of all remaining mutants.Kombo: Fallout 3 DLC will alter game's ending (December 12, 2008)

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  Fallout 3: The Pitt from GamesPress