As a result, Fallout: New Vegas literally traps players with this DLC, something other developers may be wary of. Fans who want to leave Sierra Madre simply cannot, moving into the wrong areas results in death, and based on the collar's lore, there's a dead man switch that prevents players from killing each other to some ends. In a game like Fallout: New Vegas, which emphasized choice and open-endedness, streamlining content with this sort of condition may appear strange and risky. What's risky about this is not only does it really streamline the events of the DLC, but it puts the character's life on the line.
That's the case for Dead Money in such a way, as once players arrive, Elijah equips them with Collar 21, a special kill collar, until they complete the heist. In many games, DLC is unconventional compared to its main campaign, meaning players are typically okay when a DLC is more streamlined or something along those lines.
