Breakdaddy said:
Ooh, deadlands was weaksauce too! My internal defense mechanism had blocked that one from my memory.
Now, original Deadlands was excellent, it was just the d20 conversion that sucked more than anything else had ever sucked before.
I realized that the original question never specified d20, so in that vein:
The Babylon Project. It was everything a licensed RPG
shouldn't be: no rules for playing during the actual time of the show (in fact the book says you
must play before Babylon 5 is actually built), no pictures from the show other than an exterior shot of the station on the cover (mediocre drawings for all the illustrations, of about the quality of a talented amateur), no stats for the main characters (and a tiny disclaimer that the book in no way depicted any characters from the show, what kind of strange licensing deal did they have?), a game about warring stellar powers and no starship combat system in any way.
Then there was the actual writing of the book, the system was a strange blend of rules-light and ultra complicated. Very simple task resolution, but hit-location charts that were daunting to say the least. The system was poorly explained, and you couldn't learn a dang thing from just picking it up and looking through it, I owned that book for well over a year before I even understood how the system worked, and that was only when I decided I was going to sit down and read the entire thing cover-to-cover (which just drove the lameness home). I realized how the game was supposed to run, but I also realized it had huge holes and gaps in it that made it practically unplayable for anything other than a one-shot that was tightly scripted to work around the gaps, and that if I ever ran a Babylon 5 RPG, it would never, ever be with this system.
The game was practically unplayable with just the core book, they made one suppliment, which I didn't even bother to pick up. I hear it had an attempt at a starship combat system, but you had to buy a suppliment to have space battles in a space game? What is this, Star Wars Galaxies?.