I think the one published in the 2E Chult sourcebook is the worst. It shipped without its map. This was as TSR was going broke.I was looking through some of my old D&D modules last night, and I came across The Forest Oracle, what I think is the worst TSR module ever published. It is so bad you have to read it to beleive it. So, just for the fun of seeing your reaction to it, here is one "encounter area" of the module.
Adventure module (AD&D1):
The Forest Oracle
by Carl Smith
The below is quoted exactly -- I've inserted nothing, changed nothing, and removed nothing. The "boxed text" is for the DM to read to the Players.
Note: the lake is called "Quiet Lake", and is minimally described before the below text as "strangely different" with no bird song or animal movement. "It does not seem as ominous as sad."
How many things are just wrong with this encounter and text? I mean, just start with Evan's stat block: 3rd-level fighter with 2 hit dice and 5 hit points? His damage is by an axe, but he only owns a longbow and a dagger. It hurts my head just reading it. And the "plot"?
And this is not the worst encounter scenario in the module. The whole thing is like this, just non-sensical encounters, screwed-up stat blocks, and contradictory descriptions. God this is so bad.
When I played this adventure (as a PC 3rd-level fighter), our party got all kinds of sidetracked because of encounters like this. We saw conspiracies in every encounter because the setup made no sense and explanations were so flimsy ("Why don't you pour that potion in the lake, yourself?"). We never finished the adventure. After getting about 1/3rd through it, the DM just couldn't go on because we were completely confused by the nonsense.
I'm interested in seeing text from other adventures that you think are really bad.