Scenic Dunnsmouth (Lamentations of the Flame Princess)
Scenic Dunnsmouth is a campaign for Lamentations of the Flame Princess. What makes Scenic Dunnsmouth interesting is that it's halfway between a guided adventure and a setting.
Dice Rolls and random draws from a basic deck of cards is used to determine the layout of the swamp town and the inhabitants of the town. There are a couple of constant points of focus regardless of these outcomes, but the random elements ensures that the adventure will play out differently based on the results and the combinations, enabling Scenic Dunnsmouth to be replayed despite it's mysteries remaining largely the same.
The most prolific secret of Dunnsmouth is a spider cult that plagues the town. Villagers(or players) that are infected become devoted to the original spider that began the cult bloodline and attempt to convert others by bringing them to the original spider. The spider's size is determined by the level of infection in the town and location is randomized.
The other mystery in Dunnsmouth is the Time Cube. The Time Cube seems to affect the flow of time in and around Dunnsmouth. The cube is thought to be powerful if it's power is able to be captured, but the mysteries of the cube are not fully known to the people of Dunnsmouth.
Aside from these two objectives, there are two more constants in Scenic Dunnsmouth. The less active is a witch Magda. There are some cases where she won't be present based on her randomized starting location, but largely she just acts as another inhabitant of Dunnsmouth but slightly more specialized. Uncle Ivanovik could be considered the campaigns other antagonist (the first being the spider). Ivanovik is a crazed warrior cannibal who's location largely determines his behavior, but he's never up to something good.
The rest of the inhabitants of Dunnsmouth are determined by drawing from a deck of cards. Each card in the deck corresponds to a unique person or family(each suit represents one of the four greater families of Dunnsmouth). Each household of Dunnsmouth has a unique personality differentiated even more by whether or not the household is infected. Infected households can range from violent tendencies, to spider-based mutations, to no outward signs.