I first played in 1977 in the library of Aurora Middle School in Aurora, CO. The DM was a hobbit-ish kid I'd never met, but who got permission to run the game there.
My fighter and another guy's wizard were the longest lived PCs- we died in the dungeon's pentultimate room, fighting a Purple Worm. The wizard fired his last (OK, only) MM, then began whacking at the thing with his staff. Due to the luck of the dice, he was hitting it a lot more than I did, though my few hits with my 2HD sword were pretty effective. Then the critter nat 20'd and engulfed the mage.
We sparred for a while longer, and eventually, both combatants were whittled down to 4HP. The next round was simultaneous initiative. He hit; I missed and died.