Ok, first, I didn´t get it very well. Do you also want to translate Capture the Flag ? (in that case it would be: Atrapar la bandera).
On the other hand, I think you´re talking about Flag football, well, for example here in Venezuela I´ve heard it as Flag football (with no translation), that´s how they called it back in my college years and that´s what I´ve read in the sports section of the newspapers. I guess that if I had to give it a name it would be something like Fútbol de Bandera, but believe me it doesn´t sound very good or common. Maybe you should wait for more opinions.
The thing is that in Argentina you´re more Europe-oriented, but here in Venezuela and the Caribbean, we are more used to the American style, and you can see it for example in sports. The national sport here is Baseball unlike in southern countries like Argentina, Chile, Uruguay, etc, it´s Soccer.