The big game where I was was Foursquare.
Once you reached Middle school, there was still recess. And that's where worlds collided.
There were three different Elementary schools, all of which fed into the Middle School, and three distinct different ways to play Foursquare.
Kirkirsville always played by the official rules. Underhand bumps, that's it.
Etna was underhand, but was a little faster paced and had specialty moves.
Pataskala (where I went) was either overhand or underhand, hard hits, soft hits, and any possible move you could think up.
So, once 6th grade came around, all three styles sort of collided and the results usually ended up with Pataskala kids in the higher spots. (For example, I never made it any higher than 3rd on a regular basis in Elementary School. But I was 1st regularly whenever I played against kids from Etna & Kirkirsville.)