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[Skandranon]

3 dots at level 30
A big deal for some people in diablo1.  However this essencially means that you dont kill anything in hell except diablo himself.  You can't enter a Hell difficulty game until level 30, so if you get to many kills in hell you get level 31 and are no longer a l33t g4merz.

It does mean that you were able to be super sneaky ninja type and get past all the monsters that would otherwise kill you.

No, you can kill a fair number of creatures in Hell and still not go to 31 in D1. I know this because I did a 3@30 with two special rules:

1) +144% light radius (I actually had a little more).
2) No retreating, i.e. no moving in a direction not toward a monster.

I had to kill my way through a number of large crowds of monsters on the way, and was still 30 when I killed Diablo.