Metal Meteor

From the introduction: This adventure can be can be easily customized to a party of any size or level, or run as a level 4 adventure for 5 players. It can work as a small side adventure in an existing campaign, as a standalone one-shot, or the start of a new adventure. Use the links to the tools in their relevant section to customize the adventure to your party. At some point during their travels, or when they spend a night in town, the PCs see a shooting star.