Hmmm, tough call. I would say it is. The violence is cartoonish at times, but there are still some deaths, a few gruesome ones, and it has some dark tones, especially with Red Skull.
Cythim and I were having a perfectlu good conversation about craft beer, then Playmaker shows up talking about pissing in mouths, and Sheik all but admitted he got drunk and raped murdered somebody...