Namie says play Kakurenbo.
Don't take my word for it this Halloween.
This year, Namie Amuro says to play Kakurenbo. Well, she might not be talking about the anime exactly, but she does mention playing kakurenbo in the lyrics to the song Hide and Seek. Here's the song in a playlist of two. The other song is "Baby Don't Cry." I had to put a second song there, and I just arbitrarily picked that one. (If Baby Don't Cry plays first, then skip to Hide and Seek if you want.)
Now, do what Namie says.