I found this 3D paintball game on candystand.com, it's not that great but it's worth a lawl or two due to how innacurate to the real sport it is.
I think it might be just a reskin of some fps game because the paintballs have no trajectory and act like bullets, headshots do more damage, there are multiple guns on the maps that act like their respective gun types, and I think they took the blood effects and just made them blue to resemble paint splatter.
Anyways, heres the link:
http://www.candystand.com/play.do?id=18307