^ And?
I don't think South Park is something a dev would think you HAD to do.
Obsidian did KotOR 2, and that only got a T because of of limited blood and the animated combat, and would likely qualify for E10 if it existed at the time. They also did Mask of the Betrayer, which was T because of... OK everything you can get in a T game before it becomes M. Obsidian is very good at making things "Mature" and "dark" over "gory", which is something Avatar did.