Well, yes it is.
Paintball is a sport usually played between two teams of anywhere between two to unlimited players.
We usually play capture the flag, just like the kids game except we added the wildcard of range. The games we play last anywhere from 15 minutes to 24 hours in duration, depending on what is going on. It was about Fifteen years ago that someone got the bright idea to use some 'tree markers' that the Nelson Paint company was selling to shoot at each other. Since that fateful day the technology changed, as did the paint we use, as did everything else. The early pioneers of the game didn't know what they started.