I guess chasing others around and running away are pretty basic instincts in people in any world. For tag to not exist in a world... They probably wouldn't have any kind of hunting or impulses to chase anything, I don't know how that would work.

[Besides that's thinking too much.]

Neither I really care to know, sounds too troublesome. Let's just be glad that it's not necessary to explain a basic game to everyone each time you want to play.

A sky bison? You're friends with one? How is it? I haven't really even seen a normal bison in my world, I can't imagine how a sky one would be.