B:11 King's Festival is an adventure module published in 1989 for the Basic Rules of the Dungeons & Dragons fantasy role-playing game. It also works fine with modern retroclones like Basic Fantasy RPG. It is intended for player characters of level 1-3.

Is an adventure scenario set in Karameikos and functions as both a guide for beginning DMs and an introductory dungeon. The player characters (PCs) must rescue a cleric from a group of orcs to ensure that the King's Festival happens.