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Classic Modules Today: U1 The Sinister Secret of Saltmarsh (5e)
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Classic Modules Today: U1 The Sinister Secret of Saltmarsh (5e)


In 1981, TSR published the module named “The Sinister Secret of Saltmarsh” with the module code “U1”. It was written by Dave J. Browne and Don Turnbull, and illustrated by Dave De Leuw, Harry Quinn, and Stephen D. Sullivan. It consisted of a 32 page booklet and tri-fold cover with maps.

This conversion guide allows DMs to run the original module with 5th Edition rules and provides a reference sheet for encounters.

To use this conversion guide you will need a copy of "U1 The Sinister Secret of Saltmarsh", originally available in hard-copy and now for sale in Digital format at

"Classic Modules Today: B4 The Lost City" contains the OpenOffice/LibreOffice source files used to create this PDF. Visit for instructions on creating your own classic module conversions and selling them on the DMs Guild.

Classic Modules Today are a series of products that convert early edition Dungeons & Dragons and Advanced Dungeons & Dragons adventure modules to the Dungeons & Dragons 5th edition rule set. They fully adhere to the rules set forth in the Community Content Agreement of the DMsGuild. The CCA states that adventure conversions must be:

"A streamlined, bare-bones conversion guide for someone who already owns the classic adventure — i.e., encounter-by-encounter conversion notes with any 5E stats needed, leaving out all other content."

For more information, download the free guide "Using Classic Modules Today Conversions".

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Reviews (1)
Discussions (2)
Customer avatar
GeoCentric D August 15, 2018 5:54 pm UTC
I'm running this tomorrow night for my first ever 5e session. Looking through this, I noticed none of the NPCs have a class listed. Are all 5e products like this?
Customer avatar
Mark S August 17, 2018 4:36 pm UTC
Class isn't always explicitly stated for NPCs in 5e since NPC creation tends to be organic. You build an NPC with the abilities you want to give it, then figure out the CR from that. Spellcasters sometimes have it noted under the Spellcasting heading, although I didn't opt to do it for Sanbalet and Punketah (they're wizards with different school focuses to stay true to the original module). Most of the time reading through the stat block will give you an idea what class the NPC is based on.

I wrote up a document of NPC stat blocks by class that I use as the basis for creating NPCs.

/shameless plug
/shameless plug

Hope that helps!
Customer avatar
Ronald S February 02, 2017 5:51 am UTC
Love it, hoping to see "Danger at Dunwater" and "The Final Enemy" soon. Always wanted to do those as a campaign back in the day, but never got to. Hopefully, I will be able to do them with 5e
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File Last Updated:
April 05, 2018
This title was added to our catalog on December 11, 2016.