    I think the real role of TAS is to help you to do great things that would be normally impossible. So after 29 and 26, here's lv17 pacifist style ! :)
Well, I don't know whether this demo proves the level to be possible, or confirms that it is impossible :). Tenements is far harder than the two previous levels I have completed. There's no main difficulty ... everything is incredibly difficult ! This would really be impossible to do on normal recording .
  Well, I haven't tried lv02, but I really think Tenements is the hardest pacifist level (since lv30 is impossible by construction). 
  The demo is very long (about 14 min), but I never really waste any time. There are some great parts (the archi room w/o being hit :) , some funny ones (pushing a Sergent to make the arachnotron shoot him, "pushing" my way to the exit trough 3 chaingunners with 20% health :) , sometimes I had incredible luck (the arachnotron shooting the wall instead of me).
  Sorry for fraggging a caco, but I couldn't do else (so I think it is still pacifist style). 
Well, hope you will enjoy the demo.