The Graveyard Variety Pack introduced new content to the already rich Backyard Battleground. Among them was the new Hide and Seek missions! Start out by talking to Hidey, who is located in a bush, appropriately, hiding. From there, you'll start up a game of hide and seek. If you're having trouble, or if you're just up for a hilarious watch, ZEROxFUSIONZ walks through these missions in the video below:
ZERO does a great job of explaining what you need to do while playing through the missions and reveals where you need to go to find your friends.
You can find more videos from ZEROxFUSIONZ on YouTube