Gods of the Earth (a first-level module for Dungeon Crawl Classics by Julian Bernick) is a Norse-themed adventure in which the PCs must stand vigil for a dead jarl and protect his soul from powering a ritual intended to raise the forces of Chaos.
The adventure starts with the PCs stumbling upon a funeral celebration which leads to their conscription into the main plot. The funeral offers some fun opportunities for roleplaying, but clever PCs may also use the time to gather clues about what’s really going on. The main part of the adventure takes place in a subterranean liminal space between death and life where the PCs encounter strange creatures, puzzles, and a glimpse of what awaits the world should they fail. Bernick does a great job of making the encounters feel epic while still approachable for a band of first-level reavers.
I play-tested this adventure with the author and enjoyed the bizarre creatures and visions of the underworld setting. I also ran this module for my regular weekly group, but re-skinned it with an Egyptian theme to serve as a prelude to Goodman Game’s DCC version of Dark Tower. They enjoyed the modules challenges.

If I had one criticism, it would be that the Norse theme isn’t as prevalent in the middle of the adventure, making it feel somewhat disconnected from the introductory material. It’s also easy for the PCs to discover the identity of the villain attempting to bolster Chaos’ forces, but to miss their motivations and the finer points of their plan. My players don’t mind not encountering every facet of a module’s story, your mileage may vary.
While some judicious prep will help Judges run this module, Gods of the Earth is straight-forward enough to be played in 3-5 hours and is worth a look as a start to your next campaign.