Concerne (Full title: Concerned: The Half-Life and Death of Gordon Frohman) is a webcomic by Christopher C. Livingston, parodying the popular first-person shooter computer game Half-Life 2. The comic was constructed from game screenshots, with characters posed using Garry's Mod. Livingston originally released issues on a Monday/Wednesday/Friday basis, but changed the schedule to two new issues every week on Tuesday and Thursday, citing his job. The comic was launched in May 1, 2005 and completed its run on October 31, 2006, with a total of 205 issues.