Get ready for the hardest,extremest,craziest challenge EVER!!!I don't really have a name for it,because it's simply too hard for words >=-)
Rulez:
1.Start a game at "nightmare"
2.Choose "Ironman"
3.You may NOT use any weapons!
4.You may NOT pick up and/or use any items(incl.armor)!
5.You may NOT kill any monsters,not even using your bare hands!
6.Get as far as you can!(But I would be surprised if you could even get to lvl2!)
NOTE:If some elite player manages to get to cybie (which is practically impossible)you MAY use a thermie!
GOOD LUCK,har har har!