I know that they can, but I just don't like it when people say Treyarch "stole" wall running from Titanfall when it was actually in Brink first. So if anyone "stole" wall running from anything, then Titanfall "stole" it from Brink. But I don't see why someone "stealing" wall running from anyone is such a bad thing. Wall running is cool and shouldn't really be a trademark of one game.