The DLC's add a bit more to the game, but can stand on its own well.
Lol, I thought this was going to be a DLC thread
"Fallout: New Vegas - ASDA
The Courier is trapped inside a shutdown supermarket. Only stacking shelves in a manner that appeases the ZAX supercomputer-powered self-service checkouts can open the doors back to the wasteland.
On his journey, Courier six will come across all kinds of sub-human threats, armed with anything from checkouts to stacks of trolleys in this desperate tale of what happens when one man walks into the wrong shop, looking to buy a pint of milk and a copy of Nuts."