BX Forever

Fortress, Tomb, and Tower presents multiple interconnected adventure scenarios within a fantasy game setting. A central plot involves a demonic entity imprisoned within a giant emerald, whose release causes chaos in the Iron Duke's fortress. Separate adventures explore a dragon's scheme, an NPC party's activities within the fortress, and the secrets within a lizard-man temple. Detailed descriptions of rooms, monsters, and treasure are provided for a game master to use. Game mechanics and character statistics are included for players.

Get it free at the Basic Fantasy RPG website.

B11: 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.