When a Star Falls is an adventure module for the first edition of the Dungeons & Dragons fantasy role-playing game published by TSR, Inc. in 1984.

[3] The PCs have an encounter with a monster called a memory web on the moors south-east of the Tegefed mountains, and learn of a falling star that reached the earth.

[4] A remastered version of the adventure was published in the anthology Quests from the Infinite Staircase for Dungeons & Dragons 5th edition on July 16, 2024.

Swan felt the story of When a Star Falls is "rich enough to stand on its own," adding that designer Graeme Morris "goes out of his way to avoid the usual clichés ... the complex plot is easy to follow thanks to his crisp writing.

He started by pointing out his possible conflict of interest, given that the module was developed by his colleagues at TSR UK (which also published Imagine magazine).