So rolling up ideas, I came up with a simple Quest that my party was going to have to seal away a powerful enemy using some kind of ritual, they were going to have to seek an enemy's help to do it and as a result, the enemy was going to gain access to a powerful artifact as a result of their quest. I wanted to do something remotely Thanksgiving related so I decided that the enemy who had to be sealed away would be something known only as "The Gobbler" and when I came up with more details I would make sure that the turkey theme continued. I also decided that in order to stop the Gobbler, they couldn't just fight him, they'd have to lure him on a "table" and set the table with ingredients which would activate its containment (and yes the ingredients were all components of a thanksgiving meal). This information would be had by a biker gang of Porkers, which several of my players have already had horrible run ins with Porkers in our previous missions in GammaWorld, but the Porkers wouldn't just fork over this information. They want Omega Tech for it. So there is a sacrifice up front, but it hopefully pans out since they gain the means to actually stop the BigBad.
At this point, I started flipping through the Monster Vault to try and find a creature I could use for the Gobbler. I was having a hard time coming up with something, so I turned to the Overlord section of the Fourthcore Alphabet. Randomly I determined that the overlord (i.e. The Gobbler) couldn't speak,but used telepathy to speak through a proxy. I also determined that he controlled his allies through a ritual that must be repeated on a regular basis. This was how the Porkers were able to escape! I also determined that there were bas relief images that covered his entire base and I decided that these would be images of natives fighting armored warriors (a little nod to the colonial Americas).
After that I realized I needed to determine what the base looked like. So I rolled on the Dungeon section. It came across that they were caverns which were constructed by an ancient people who no longer used them. I decided it worked well to have these caverns be a home to a native people group who lived their until they fled do to the advances of a force known as the Grims. I also determined that the main denizens of the dungeon were Animated Constructs. At this point I landed on the page of elementals and start thinking about how perfect it would be if the minions of the Gobbler were all Thanksgiving food related. Fighting a golem made of gravy would make for a very different meal afterwards.
The next chamber I wanted to be a gauntlet of Traps so I rolled for three devious devices that they would have to get past to gain access to the next area. The first one was spectral tendrils, that I reflavored as cranberry sauce reaching out to grab people. It had the effect on a hit that the items on the creature would begin to rust and decay away as the jello salad made them older and older. The next trap was a pitfall full of old turkey carcasses and bones that if a party member fell into it (they had to jump the pit, which they used some very creative thinking to make it over) would summon 4 skeleton turkey minions (reskinned skeleton warriors). The final trap was a false floor made of stuffing that gave way when three party members stood on it. They failed their perception checks to smell the difference and it gave way under the whole group dropping them into the last section.