Sierra Madre Grand Opening!

 is a quest in the Fallout: New Vegas add-on Dead Money.

Quick walkthrough
Track down the source of the Sierra Madre invitation.

Detailed walkthrough
This quests is given to the player automatically after downloading the Dead Money DLC and then, either loading a saved game or stepping out into the Mojave wasteland for the first time.

The Sierra Madre Broadcast radio signal is found which advertises the Sierra Madre casino.

Travel to the Abandoned BoS Bunker, north-east of Nelson to learn more, south-east from Camp Forlorn Hope.

Upon entering the bunker, head down the stairs and approach the door ahead of you, attempting to open the door causes a prompt to appear asking weather you wish to continue and commit to traveling to Sierra Madre. Accepting the challenge opens the door.

Walk through the door and approach the slot machine, The Courier is then knocked unconscious by gas flooding into the room and the player is treated to a slide show detailing the history of the Sierra Madre casino.

Upon waking the player is greeted by Father Elijah, who explains that he has fitted you with an explosive collar and that he wishes you to recruit several companions in order to carry out a "heist" on the casino.

After getting all the information you wish from Elijah, ending the conversation starts the three quests Find Collar 8: "Dog", Find Collar 12: Christine and Find Collar 14: Dean Domino