People have discussed both the best and worst D&D modules of all time. For many, the Drow series, the Giants series, and Keep on the Borderlands, etc., are generally considered to be some of the best D&D modules of all time. On the other side, Castle Greyhawk, Gargoyle, Die Vecna Die! and The Forest Oracle are widely panned.
I’m looking for your thoughts on some of the most underrated D&D modules. You can cite ones that are either usually poorly regarded and/or largely ignored.
I’ll throw out one for starters—B9: Castle Caldwell and Beyond. You don’t hear much about this 1985 module, but it contains 5 adventures that cover a variety of challenging situations. In one, you have to clear out a castle for its new owner; in another, you start behind enemy lines, needing to recover your equipment and escape. There’s a princess rescue, and two above-average, short dungeon crawls to round things out. All in all, this is a varied, entertaining module that should be worth your time to track down.