From the back cover:
"No use big words play Og.
Role Play no many words.
Try talk people try do things no many words.
The world of role playing has just become easier with...
Og: The Role Playing Game.
This role playing system challenges players to a world of limited words. Just like real cavemen, you will be struggling to make others understand you. This humorous role playing system takes you into the future by taking you to the stone age.
Warning: Do not buy this game if you do not have a sense of humor. This free-style, role playing system is recommended for advanced gamers looking for something a little difFeREnT. Game requires two d10's and a handful of d6's."