d21lewis on 30 September 2011
I didn't play CoD WaW (Zombie mode) nor did I play Left 4 Dead but Wikipedia shows that L4D didn't get a "Horde Mode" until it got 2009 DLC. Also, Gears released a few days before CoD WaW so, if we're being technical, Gears of War did have the mode, first. Also, the OP asked about third person shooters. L4D and CoD are first person.
I'm just saying .......
