User blog comment:Argorrath/Treyarch releases a BO2 teaser video called "Origins" for DLC 4/@comment-5213593-20130807020815

NEWS! Left 4 dead 3 is confirmed! It will run on source 2 engine!! Search 4 more news. LEFT 4 DEAD 3 CONFIRMED = HALF LIFE 3 COMFIRMED!