 The comic 's popularity , as well as the fact that Livingston stated he does not intend to continue the comic through Half @-@ Life 2 : Episode One , led to the appearance of an unofficial sequel to Concerned , entitled Concerned 2 : A Concerned Rip @-@ Off : The Continuing Adventures of Gordon Frohman , and created by Norman N. Black , although it is currently on an undisclosed hiatus since November 28 , 2010 . 
