"Welcome, citizen. Here, take this spear and shield. I’ve cleaned off the worst of the rust, and you’ll need it, come morning. They’ll try for the western gate, and throw everything they’ve got at us. But since we have time tonight, let me impart some crucial knowledge you’ll be needing. This custom designed rules set allows the scrupulous dungeon master to design a series of events that lead to, and model, a siege. Whether defending a massive capital city, a border prince’s fort, or the PC’s own outpost, these rules provide flexibility and open world building for the PCs to save (or destroy).
This module includes fifteen pages of rules, stats and tables, along with a twenty page sample campaign detailing the Invasion of the Phandelver Valley and the depredations of the Red Claw Orc Tribe. The PCs are tasked with defending the town and building the defenses up so that the citizens can survive.
- from the publisher's blurb