Zombies!!! 36 Supermarket Sweep

 

This expansion would be different in that each player would set the tiles out first, one at a time. Adding zombies along the way. Then the game would begin. 

You draw 3 cards each, highlighting different items you need to retrieve to get in and out of the store. First one to gather all their items and make it out, wins! You could even have them draw the cards off the top of the deck one at a time. So that each time they fulfill a request, they draw another card and head into the next direction they need to go. 

It's a great idea that would change up the game significantly.