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Underwater Campaigns

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Welcome to the GM's Day sale! From now through March 10th, this title has been marked down by up to 40%! For more values, visit our GM's Day sale page.

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You can find the FANTASY GROUNDS version here


Print On Demand is finally available, with hardcover, a new layout and updated version!


A Guide to Running Underwater Campaigns

Underwater Campaigns is the perfect resource for exploring the wonder and danger of underwater worlds and adventure - oceans, lakes, rivers, sewers, and flooded ruins. Whether you want to add an aquatic room in your dungeon, flesh out trade with the ocean creatures, or create an epic tale at 20,000 feet, this work is for you! This work takes existing nature and weaves the fantasy setting through it while guiding you to create your own underwater campaigns.

Inside, you will find:

- An underwater adventure seed for any level

- 68 random underwater encounters

- Underwater rules for combat, skills, feats, and magic

- 67 new aquatic monsters

- The return of the Colossal creature size!

- 26 new aquatic NPCs

- The return of the Gehreleths!

- 35 spells to help or hinder underwater targets

- 19 magic items for underwater adventuring

- New disease mechanics and examples

- 2 unique underwater locations

- Professional layout using over 100 pictures on 158 pages


We are honored and delighted that Underwater Campaigns was noticed and mentioned by WoTC

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Underwater Campaigns was awarded Best Supplement of 2021 by No Dice Unrolled

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Reviews (4)
Discussions (20)
Customer avatar
Joshua B May 10, 2023 8:05 pm UTC
PURCHASER
If I buy the PDF, will it give me credit toward the hardcover if I decide to upgrade for the combo later?
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Customer avatar
Daniel C May 11, 2023 11:08 am UTC
CREATOR
I honestly don't know. That mechanic is run by dmsguild/drivethrurpg. I do not see that question in the dmsguild FAQ. To make matters more interesting the previous community go-between, Lysa Pernrose, accepted a different job so I am not sure who replaced her but whoever it is they are not producing content that I can find. In short I don't know. Sorry mate.
Customer avatar
Charles H February 07, 2023 11:14 pm UTC
PURCHASER
When I attempted to purchase, it did not allow me to order the hardcover version. It only adds PDF. I couldn't get a hardcover ordered, so I eventually purchased the PDF. After reading it, I would love to buy the hardcover. Is this a problem anyone else is experiencing?
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Customer avatar
Marco B February 10, 2023 8:30 pm UTC
PURCHASER
Hi, did you solve it? If not, you can try to ask help to the customer service here: https://support.dmsguild.com/hc/en-us/requests/new
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Customer avatar
Daniel C February 13, 2023 12:58 am UTC
CREATOR
let me know if this is still a problem for you. :)
Customer avatar
Daniel C December 18, 2022 2:45 pm UTC
CREATOR
Aboleth Watcher (page 74) has a dnd 3.5 spell reference that I failed to fix. Remove: 2/day each: energy immunity. Replace that with an Action: Energy Immunity. The aboleth watcher is immune to one type of energy damage for 24 hours. If the aboleth watcher uses this action again then it is immune to a new form of energy damage and the previous immunity is removed.

(the idea is that it uses an action to be immune to ONE form of energy damage but can't do this twice and choose two different ones). I apologize for the confusion. This error was identified and I thought it had been fixed :)
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Customer avatar
Terrelle S December 20, 2022 8:29 am UTC
PURCHASER
Thanks, i appreciate it!
Customer avatar
Terrelle S December 18, 2022 2:31 am UTC
PURCHASER
On the state bloc of the Aboleth Watcher (on my pdf version (1.2) and on your thumbnail above, you have a 2/day spell called "energy immunity" which i couldn't find referenced in the book. So looking up the spell, seems like it is from the Draconomicon from 3.5? Is there a 5e version of the spell, or version of the spell you intended to list in the book?
Thanks for the great resource! I'll be implementing many of your critters in my campaigns.
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Customer avatar
Daniel C December 18, 2022 2:34 pm UTC
CREATOR
Damn. I thought I fixed that. Yeah my mistake. It was supposed to be taken out of the stat block and then turned into an action. Every once in a while the old stuff creeps in and I fail to notice it :)
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Customer avatar
Daniel C December 18, 2022 2:42 pm UTC
CREATOR
Yup that one fell through the cracks. Thanks for letting me know. In principle the critter can use an action to choose to be immune to one form of energy for 24 hours. Sorry for the confusion :)
Customer avatar
Daniel C November 08, 2022 3:48 pm UTC
CREATOR
Added: Verbal Components and Spellcasting.
If you use a spell with a verbal component and you cannot breath the substance you are in your breath is gone (this is the same mechanic I used in Breath Weapons). You are now drowning (water breathers can "drown" in air).
Thanks to Redit for asking this question :)
Customer avatar
Kevin S November 06, 2022 7:41 pm UTC
PURCHASER
Are any types of underwear transport covered? Was thinking of just using Spelljammer rules if nobody has anything better.
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Customer avatar
Daniel C November 07, 2022 12:50 am UTC
CREATOR
That is the best bet. Only rules i know about are for surface ships and astral ships.
Customer avatar
Daniel C November 04, 2022 3:13 pm UTC
CREATOR
Good News! Print on Demand is now available !!!
Customer avatar
Daniel C October 21, 2022 5:33 pm UTC
CREATOR
Print on Demand is almost here! I am waiting on a proof and a final look-over. I am hoping it will be ready by early November 2022!
Customer avatar
Kevin S September 11, 2022 7:52 pm UTC
PURCHASER
Anything about transportation (submarines/bathysphere) rules? And maybe dive suits similar to LoZ’s Zora armor? Or maybe something like Bioshock Big Daddy dive suits?

The description blurb leaves out the transport issues, and was wondering about that before I commit to a must buy or wishlist item.
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Customer avatar
Daniel C September 12, 2022 10:41 pm UTC
CREATOR
Underwater Campaigns mentions very briefly how diving bells work, but the tech is above what some DnD campaigns deal with so its left "for a DM to sort out." The only transportation in the game is the apparatus of Kawalish (spelling?). Underwater Campaigns goes into detail on how to maintain air (or water environments) with a utility spell, converts airy water to 5e, and discusses options for getting low level characters into the ocean. The biggest help is that by the time the characters are 4th or 5th level they have at their disposal all sorts of magical means of moving and breathing under water.
If your campaign deals with more technology there are a few sections on how to use ocean resources like methane hydrate and ambergris.
I hope this helped answer your question.
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Customer avatar
Kevin S September 21, 2022 6:30 pm UTC
PURCHASER
I’ll be honest, I really think someone needs to change this. Maybe even use Spelljammer like rules, that have a pocket of air or magic sand (hydrophobic) like air over the hull. That way you can use the Sea Jammer (or some better name) to get to interesting underwater locations, but occasionally have ‘We Need to Go Deeper’ like battles & having holes in the hull isn’t immediately going to TPK.

Dive suits that basically let the players fly underwater. Maybe some dive suits for floor bed walking, but I could see a clockwork Bioshock Big Daddy based monster working well.

Also, as a side note I was thinking maybe magical pollution could be a mechanic to mutate just about any sea creature into a nightmare of your own design.

I haven’t a head for mechanics & might need to just steel stuff from optional Spelljammer rules. Biggest things I’ll need to rethink are what kind of weapons would work best on an underwater vessel.
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Customer avatar
Daniel C September 21, 2022 11:56 pm UTC
CREATOR
Sounds like you have identified a possible product that others would buy :) I wish you luck. I'd suggest looking at the old 2E spelljammer rules. I believe those are more of what you are looking at. The 5E version is very light on vehicle specifics. When it comes to game mechanics just start slowly and change a small piece. See what happens.
Customer avatar
Daniel C May 30, 2022 12:41 pm UTC
CREATOR
Looks like we are going to try and pay a guy to do a conversion of this into the format that dmsguild allows for print on demand. I hope this works :) I want a copy on my shelf also. More to follow I hope.
Customer avatar
John S April 14, 2022 2:07 pm UTC
PURCHASER
Just another voice saying if you ever did manage to get this into a POD format, you'd have a paying customer right here!
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Customer avatar
Daniel C April 15, 2022 11:17 pm UTC
CREATOR
I wish John. Its a daunting thing to redo something completely in a different platform. I do appreciate the good words though :)
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Customer avatar
Daniel C September 12, 2022 10:42 pm UTC
CREATOR
John, working on a POD for this now. We hope to be done in a month.
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Customer avatar
Marco B November 04, 2022 3:12 pm UTC
PURCHASER
Hi, the POD is now available!
Customer avatar
Thomas J January 15, 2022 2:04 am UTC
Is there any chance of a print on demand version of this book? This is definitely something I'd love to physically have on my shelf!
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Customer avatar
Daniel C January 16, 2022 2:48 pm UTC
CREATOR
In short ... no :(
We learned many a thing the hard way when it comes to print. In short we would love to put this in print but in order to do so we would have to redesign it from the ground up in a different program. The good news is we learned exactly what not to do and our next work will be in a format that can be printed. As an aside I paid stupid money to do a 1 off print of something else of mine and it is very easy to see where the shortcomings are if you do not use Adobe's indesign. I would love to have this available for print but the labour involved is more than Marco and I can manage now seeing as we both have "real" jobs now. :(
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Customer avatar
Marco B November 04, 2022 3:18 pm UTC
PURCHASER
Hi, the POD is now available!
Customer avatar
Andy L January 14, 2022 9:13 pm UTC
PURCHASER
Such an amazing supplement! It covers an aspect of D&D5e that needed to be dealt with. Precise and smart solution, cool art and a lot of fun! That's why it was the Best Supplement in the NDU Awards 2021!
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Customer avatar
Daniel C January 16, 2022 2:45 pm UTC
CREATOR
thanks mate!
Customer avatar
Daniel C January 09, 2022 3:15 pm UTC
CREATOR
This was just awarded Best Supplement for 2021 by NDU (Reviewer's Choice) Thanks to everyone at No Dice Unrolled!
Customer avatar
Pramod D September 26, 2021 1:57 pm UTC
PURCHASER
Any plans to add print format?
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Customer avatar
Daniel C September 26, 2021 9:01 pm UTC
CREATOR
We looked into print and we would have to recreate the entire .pdf in a different program. So it doesn't look like we will do that :( Its a possibility for the future though.
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Customer avatar
Marco B November 04, 2022 3:22 pm UTC
PURCHASER
Hi, the POD is now available!
Customer avatar
Daniel C September 21, 2021 12:02 pm UTC
CREATOR
Fantasy Grounds conversion is out :)
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158
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File Last Updated:
November 03, 2022
This title was added to our catalog on August 25, 2021.