“Headgame” (*1/2 out of four) was a gory, ugly horror thriller about a group of young folks (Leonard Roberts, Carly Steel, Jame Hill Fuller) who awaken inside a locked warehouse with cameras screwed into their heads (!) and soon find that they are competitors in (what else?) a deadly reality game in which they have to kill each other to survive. Umpteenth rip-off of “Saw” is only for those who thought that series was too tame and intellectual; movie also has the gall to rip off “The Hunger Games” as well.