#RPGaDAY - Day 5: Most Old School RPG Owned

This one has caused a little confusion with the term, "old school". I was just thinking the oldest RPG you have, maybe I should have worded it that way... oh, well. You live and learn!! I didn't want to just go for AD&D again, as I've already waved my Player's Handbook around. I sold my Star Frontiers sets, so the oldest game I have must be Top Secret.