So personally I could spend hours on the post considering the amount of gore, sexual references, cussing, etc in games but only a few come to mind when I really think about a heinous video game. Manhunt released for the ps2 back on nov 2003 and I remember playing that game and almost being beside myself from the brutal execution style of play. Definitely a thrilling game although the graphics aren't the best. But some of the ways you sneak up and kill people....whew. Cutting heads off with chicken wire, gutting people. taking the back end of a hammer and spiking someone in the face, sending a sickle up the groin of an opponent. Just a few of the dozens of weapons/execution styles in this game. Honorable mentions would have to be Doom, Mortal Kombat, and GTA series.