Rules Simplicity Rules are unclear and too long. There are rules that add complexity without adding to playability or learning. The rules are not entirely clear or complete. There are rules that could be eliminated without harming the game. Rules are fairly short, clear and complete, but could be streamlined a bit.
Rules are short, clear and complete.
The content is incidental. One can play without learning much. Significant cognitive effort is spent on things that have nothing to do with the content. Winning and learning are closely entwined, though some mental effort is spent on aspects that are just about the game. Winning the game requires learning the content.