[retro64]

As just a straight 1:1 translation to 5e, it isn't really hard. The monsters are roughly the same, so it isn't hard to run an AD&D adventure on 5e. I would argue a "novice" DM could read through an AD&D adventure and do the translation on the fly.

I would agree you should be able to run the module as-is and insert a monster of the same type from the 5e monster manual, but certainly not use the 1e stats straight up.

1e monsters wouldn't stand a chance against a 5e party otherwise.

[ygjb]

That's certainly one perspective, but OTOH if you play 1e or 2e monsters straight, there are alot of instant death effects that are much higher risk and far more debilitating impacts :) If the players are comfortable with it, it can bring back some of the old-school feel of D&D where death is behind every door...

[Jtsummers]

"A slime mold was above the door you entered, roll a d20 and add your dex mod."

"I got a 19"

"OK, well, it's on you. Roll a d6"

"I got a 5"

"Well, you're going to die quickly then."

"What did I need to live?"

"To look up."

[kop316]

> If the players are comfortable with it,

I think that is the bigyest thing DMing. I don't mind playing some of the very deadly dungeons, but you do really have to work with the players to set expectations on it. Same with how you DM, play style, etc.

[kop316]

Sorry, that was what was in my mind when I wrote that, you are correct on that! You want to use the 5e monster manual, not the original stats.