User blog comment:The Milkman/Skyrim 1.8 Beta Update/@comment-5500417-20121022000735/@comment-4113369-20121022150338

According to Webster's, tetrical is an adjective that means something like forward, perverse, harsh, sour or rugged. So SpiritofRevenge130 is saying that the theme is crude and in-your-face.

Or, you know, s/he could've misspelled something. Who knows, really?