Sensing Games

Here's a list of a games that involve finding or sensing other people.  Hide and Seek is the classic.

Note that these categories are pretty fluid and there is a lot of overlap between different ones.  Where applicable I've cross-referenced similar games.

Come a little closer
Ghost in the Graveyard
Hide and Seek
Hide the Button
Lion's Cub
Marco Polo
No Ghosts Out Tonight
Piggie wants a signal
Punch the Icebox
Red Light/Green Light
Sharks And Minnows
The Blind Game