Protests are mounting against a new Columbine-inspired video game slated to be released by the makers of the infamous “Grand Theft Auto” series. The game, titled “Bully,” features a high school student tormented by his peers, who takes his revenge with extreme violence, killing fellow students and teachers. The company, Rockstar Games, describes the game as “humorous,” and downplays the violent aspects, but the game’s October release is likely to cause old debates about the effects of video game violence to rage anew.