River Rapids Rampage is the first part in the four-part of the online game serial, Mayan Monster Mayhem.
Scooby-Doo and Shaggy visit the Culpepper Hot Sauce Factory and ask Clodeius T. Culpepper about how to find "El Habanero de Mucho Gusto" peppers, which they want to put in a chilli recipe. He directs them to the Temple of Lost Souls and warns them of its dangers, but offers them supplies from his river camp. After they collect the supplies and get to the boat (as well as having to deal with the jungle animals that have taken over the camp), the Mayan Mayhem attacks and they have to brave the rapids to escape.
After reaching shore, Shaggy reveals that he lost the map during the chase, but feels relieved that they lost the Mayan Mayhem. Unfortunately, the Mayan Mayhem ambushes Shaggy and Scooby and destroys their boat.
- Clodeius T. Culpepper (first appearance)
- Mayan Mayhem (first appearance)(no lines)
- Snake (single appearance)(no lines)
- Lion (single appearance)(no lines)
- Crocodiles (single appearance)(no lines)
- "El Habanero de Mucho Gusto" peppers (mentioned)
- Five Skull Fire Sauce (mentioned)
- Although not canon, Shaggy reveals that the Culpepper Hot Sauce Factory makes the Five Skull Fire Sauce, which he used first used in the What's New, Scooby-Doo? episode, Big Scare in the Big Easy.
- Play at ScoobyDoo.com