Go to the Medical District. Go to the clinic (don't get your head blown off) then go to the medical doc hall where Christina is at. Don't go inside, look behind you' You should see a room of dead people. Go inside and look to the left. Have fun! It is the best sneak armor in the game.
Assemble Your Crew - Recruit Dean Domino, Christine and Dog. - 20
Cash Out - Confront Father Elijah in the Sierra Madre's Vault. - 30
Having a Ball - Complete the Sierra Madre Gala Event. - 20
Safety Deposit Box - Trap Father Elijah in the Sierra Madre's Vault. - 40
Sierra Souvenir Aficionado - Collect 500 Sierra Madre Chips. - 30