Violence The violence in BattleBlock Theater is pretty cartoonish, though graphic enough to warrant the T rating. Your cartoon character can explode (with animated bones and chunks), get impaled on spikes, get electrocuted, eaten by strange animals, and more. You also fight cats and other characters with weapons like bombs. The violence is played for laughs, and the narrator will occasionally admonish you for dying. None of the violence is photorealistic.
Scary Imagery There is some disturbing imagery, most notably when your friend Hatty is forced to wear the cursed hat, and you are captured by cats. Most kids will likely be fine with the morbid, surreal humor of the game.
Strong Language Crude humor is right there in the T rating of the game. BattleBlock Theater makes a lot of poop jokes that will no doubt be delightful for kids—including a character who poops himself to death, complete with a silhouetted sequence of spraying diarrhea. This game will no doubt introduce "what the fart" into your kids' lexicon. The narrator also comes close to swearing several times; instead of saying the s-word, he'll start to say "sh-" and then stop himself and say poop instead. It's played for comedic effect. Other than that, there is no swearing in the game.
Consumerism There are references to other games by The Behemoth in BattleBlock Theater, which can spark interest in their other games. Other than that there is no consumerism.
Discrimination The block-like player characters of the game appear to be without gender. You can customize them however you like, and choose from a variety of colors. They are humanoid, but not human. In a sequence where the narrator discusses your friends, only one of the described characters appears to be a woman. Another one is a one-eyed block person with a mustache who appears to be wearing makeup, whom the narrator describes as a "thing," in what could be meant as an offensive joke about transgender people.