Excellent Game, even better then JK2 since graphics are better (textures weren't that great in JK2), Raven did it again....man, I'm happy they are doing Quake 4.
Don't know about the demo, I play the retail version, but if anyone got problems with gore, just do this:
When starting the game add +set lock_blood 0
When you start the game,pull down the console with shift-~
Type 'menu lock'
Turn on all of the gore and set a new password (blank works).
Then restart the game. The menu will appear and the game won't have gore locked out anymore.
Supporter of the "Chewbacca Defense"