D1 was the first game I ever played on pc. I still remember the moment when I saw a square area on lvl2 and since I had killed pretty everything on the way with ease, I thought "ok, what can happen if open the door" and then "ahhh fresh meat...". And how I avoided this guy until I got a "sword of the bear", and how pleased I was when I finally managed to kill him. Then there was Leoric, Chamber of bones, Griswald's edge, the mage whose concentration I've broken, and many more. Though I don't play original D1, I still play one of the fans add-on.