40 40 in.
Back when I was just a wee squeaker, us denizens of The Old Pigsty played this. It was far too serious business for a playground game.
Basically, one person is "it" and has to stand on a given item. Usually this was a big old rusty drainpipe on the side of the school that was conspicuously painted black against the red brick wall. They count out loud eyes shut and back turned to 44 while the others disperse into various places. The others have to get to the drainpipe, touch it, and shout, "40 40 in," and they're safe.
However, if seen by "it," "it" can shout out, "40 40 i see [name]" and they're considered caught. Whoever is first caught is "it" for the next round. Rounds continue until everyone's either in or caught.
Whoever was on when the bell went to file back into class after break or lunch was considered to have lost and everyone else was entitled to point and go "AAAAAAAAAAAA" at them until they lashed out in a fit of autistic screeching.
Needless to say, we took this way too seriously. Distraction techniques were employed liberally. A common one was to grab the fattest player and scurry in close file behind him, using him as mobile cover. There was one round where I was "it" and upon turning round I saw all the other players huddled in a mass in the middle of the playground underneath a huge morass of all their coats. I started shouting out, "40 40 I see Bob, Jim, Partario, Roland, Zammo, etc." systematically and felt very smug, only to realise that this was actually everyone's coats zipped together with someone who wasn't playing inside them to shuffle them (Lumpy Dave, who'd been promised a bag of jam donuts for his efforts) along the ground as a distraction while everyone else snook along the walls outside my field of vision.
I then got revenge the next day by, every round, going into the school building itself and leaning out the upper floor window to tag the drainpipe from there. This was deemed to be Cheating and Gay, though, and I was subjected to a beating.