Questions tagged [call-of-cthulhu]

For questions about Call of Cthulhu editions up through 6th Edition. (For 7th, use [call-of-cthulhu-7e] instead.)

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Why wouldn’t I just run away from the eldritch horror?

I am struggling with character motivations in Call of Cthulhu or similarly investigative horror settings. For some reason I seem to have issues imagining the reasoning behind characters who really ...
fgysin's user avatar
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47 votes
5 answers
7k views

Skills the player has, but the character doesn’t vs. skills the character has, but the player doesn’t

This question results from a small debate I had last weekend with our gamemaster during a session on Call of Cthulhu. A player wanted to check if an NPC is alive or not. The players had put zero ...
MrTony's user avatar
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32 votes
15 answers
2k views

How can I make BRP less variable?

I like the simplicity of BRP's percentile-based skill system. (Chaosium's Basic Roleplay, or BRP, is the system behind Call of Cthulhu and Runequest, among others.) It makes it trivial for new ...
mxyzplk's user avatar
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29 votes
6 answers
2k views

How can I reward Cthulhu characters for going mad?

I like it when, in Cthulhu games, Investigators go mad. With that in mind, I'd like to give some reward for the first Investigator to go mad. For example, perhaps, at the beginning of the next game, ...
Graham's user avatar
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26 votes
6 answers
4k views

Player does crazy elaborate things, without the GM knowing where it will lead

Background Information: System is CoC, the game is a multi year long campaign, set in the 1920s. The Players character has a chemistry and firework background. The character has no strong weapon/...
Pudora's user avatar
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24 votes
10 answers
5k views

What do I need to change about Call of Cthulhu to set it in the 60s?

I am in the process of planning a CoC game (or Trail of... I've not picked up a copy but it looks interesting) set a long time after the events of the Whisperer in the Darkness. To do so, I wanted to ...
AncientSwordRage's user avatar
23 votes
4 answers
7k views

Is it plausible to have a Player Character play as a villain against the rest of the party?

If anyone has experience running a game like this, what are some common errors to avoid and tips you would give to a GM embarking on such a campaign? Specifically I intend to have a 3 PC party with 2 ...
Yoshiki's user avatar
  • 333
21 votes
1 answer
767 views

Game in which the stars are right

I recall reading the introduction fiction to an RPG years ago, and I'd like to know its name. The game was set on a Mars colony, just barely self-sufficient or possibly slowly dying off. Shortly ...
Canageek's user avatar
  • 3,870
20 votes
5 answers
2k views

Why the bad guys don't just teleport somewhere drop a bomb and teleport back?

This question could be also How to avoid teleport/drop bomb/teleport back attacks? or How to avoid the use of Dimensional Shamblers as bomb carriers? Background Recently my group of players thought ...
pconcepcion's user avatar
20 votes
2 answers
12k views

What are the changes between editions?

What changes are there between each edition so that I can update earlier edition modules more easily? I have many modules for Call of Cthulhu that I have picked up over the years but I only own 3rd ...
jeff rixon's user avatar
18 votes
5 answers
3k views

What happens if my players capture a cultist at the start of Masks of Nyarlathotep?

I'm about to run Masks of Nyarlathotep for the first time. In the very first scenario, Jackson Elias is murdered by cultists, which kick starts the adventure. However, the scenario assumes that the ...
synesthesia's user avatar
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17 votes
1 answer
4k views

What are the main differences between Call of Cthulhu and Trail of Cthulhu?

I know that Chaosium's Call of Cthulhu is essentially the official Cthulhu RPG, but I've also heard a lot of good things about Trail of Cthulhu (using the GUMSHOE system). They both seem to be well-...
Jakob's user avatar
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16 votes
3 answers
2k views

How to find the line between an investigation and railroading

I'm a fairly experienced GM creating and running a series of Delta Green games (a modern supplement for Call of Cthulhu). While my players and I enjoy the game, there are parts that bog down and get ...
sillyputty's user avatar
  • 3,533
16 votes
1 answer
2k views

Are there official or unofficial rules for drugs and addiction?

I’m playing the 7ed version of Masks of Nyarlathotep. I decided to have my character a laudanum user as he’s an opium addict, because I was certain there were rules about narcotics and drug addiction ...
Richard Cosgrove's user avatar
14 votes
6 answers
22k views

Which Call of Cthulhu books do I need to get started?

I'd like to get into Call of Cthulhu. Which books do I need? I have a limited budget, so I'd prefer to get as few as possible. Specifically, tell me: How useful will the core book be on its own? ...
Graham's user avatar
  • 6,159
13 votes
3 answers
2k views

Which published scenarios use Cthulhu himself?

Cthulhu seems difficult to use in scenarios: not least because, according to Lovecraft's story, it takes a ship to kill him. Which published scenarios feature Cthulhu prominently? I'm mainly ...
Graham's user avatar
  • 6,159
13 votes
9 answers
32k views

Short ideas for the development of a Call of Cthulhu campaign or brief adventure [closed]

Community wiki post. Everyone can add an answer containing a short idea for a campaign, be it an event, a characteristic of the world, an artifact or object, or an NPC character. Fellow masters can ...
13 votes
4 answers
2k views

CoC's Sanity-like rules for the nWoD?

Is there a good adaptation of Call of Cthulhu's Sanity rules to the Storytelling system of the new World of Darkness (possibly replacing Morality)? (Edited the title to make it more precise.)
OpaCitiZen's user avatar
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13 votes
2 answers
347 views

How can the Investigators banish Abhoth permanently?

In Dunwich: Return to the Forgotten Village, the God Abhoth dwells below the ground, spreading its filth and decay. Normally, Mythos Gods are associated with Call/Dismiss spells. The Call spell ...
Destruktor's user avatar
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13 votes
1 answer
455 views

Metafictional Lovecraft in a Call of Cthulhu campaign

Is there an official stance - expressed in the publications of Chaosium and/or its licensees - on how Lovecraft and his works are incorporated metafictionally into the universe of Call of Cthulhu, if ...
OpaCitiZen's user avatar
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11 votes
4 answers
860 views

Lovecraft's Deep Ones and co. in the 21st century

Are there any official (ie. published by Chaosium or its licensees) sources on what the Deep Ones (and, secondarily, similarly "human-scoped" creatures: ghouls, Mi-Go etc) of the Cthulhu Mythos are up ...
OpaCitiZen's user avatar
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11 votes
2 answers
4k views

In Call of Cthulhu 7e, how does one increase their HP Max?

I’m recently starting to play Call of Cthulhu 7e, and really enjoying it. My Investigator is also enjoying it so yay, this Keeper is happy. However, we just finished our first Scenario and she asked ...
Steve's user avatar
  • 113
11 votes
2 answers
860 views

How to execute horror when there is safety in numbers

Questions such as this one and this one cover how to execute horror in a role-playing game fairly thoroughly. This process must be modified, however, when the traditional trappings of a game session ...
sillyputty's user avatar
  • 3,533
11 votes
2 answers
2k views

Do I need to play the original Call of Cthulhu before Achtung! Cthulhu?

Previously I've wanted to get into Call of Cthulhu, but hadn't ever gotten around to it. I found out about Achtung! Cthulhu, created by Modiphius, which can be played within the Call of Cthulhu world. ...
Emmily's user avatar
  • 111
11 votes
1 answer
2k views

Chaosium BRP: What's the difference between "Magic" and "Sorcery"?

I invested in Chaosium's BRP (mostly because I love Call of Cthulu). I am stumbling over this: Mechanically, what are the differences between "Magic" and "Sorcery"? I get the conceptual ...
SteveED's user avatar
  • 2,084
11 votes
3 answers
638 views

New GM to a Laundry RPG game [closed]

What should a new (and not so experienced) GM watch out for when starting to run a game set in Charles Stross's Laundry universe? Note that all this could be applied to a Call Of Cthulhu game as well ...
Sardathrion - against SE abuse's user avatar
11 votes
2 answers
872 views

Is there any reason not to always try to knockout rather than damage?

I was re-reading the rules of Call of Cthulhu (5th Edition) today whilst preparing an adventure and saw the knock out rules: Use this rule to render a target unconscious rather than to do physical ...
Averroes's user avatar
  • 859
10 votes
4 answers
2k views

Encouraging players to not ignore the story

I recently GM'd my first game where I ran a single session Call of Cthulhu game in which the investigators were travelling from Arkham to Boston. They encountered a few mysterious events on the road ...
John W's user avatar
  • 101
10 votes
6 answers
4k views

Which Delta Green books do I need to get started?

Following on from Which Call of Cthulhu books do I need to get started?, I would also like to get into Delta Green. Similar questions, then: How useful will the core book be on its own? Are any ...
Graham's user avatar
  • 6,159
9 votes
4 answers
894 views

How can I keep the Cthulhu mythos new and mysterious to experienced players?

I am currently preparing a Call of Cthulhu adventure, and I am hoping to be able to play the game on a regular basis in the future. But I am having concerns about keeping the mystery in the game from ...
derp's user avatar
  • 3,059
9 votes
3 answers
2k views

Cthulhu Campaign - How to create a more satisfying climax?

I'm in the midst of creating a campaign for my CoC group. By now, most of the material we played basically came down to these endings: a) Run away and hope whatever it was doesn't follow you anywhere....
Scorpio's user avatar
  • 193
9 votes
2 answers
377 views

How can I as GM control off-topic moments and get the players to maintain a serious tone?

My friends and I started playing RPGs at the same time without the help of any experienced person. I am the GM but I struggle to make the players focus on anything that can progress the story in some ...
Carlos Benedetti's user avatar
9 votes
1 answer
786 views

Do I need to buy Call of Cthulhu 7th edition if I have the quickstart and previous editions?

I've just picked up the quickstart for Call of Cthulhu 7th edition, which I thought was great. Given that it seems to cover off most of the essential game crunch (conflict resolution, and character ...
synesthesia's user avatar
  • 3,191
8 votes
3 answers
8k views

Can a player character increase stats?

I'm a new GM. With friends, we had two sessions, and after each of them, I've let them roll for skills increase. But recently one of them asked if he should roll for STR because his character is weak ...
DeMo's user avatar
  • 429
8 votes
1 answer
260 views

How does a ghost hunter use the screwdriver and string in the “gost [sic] hunting kit?”

Using a pre-generated character — Maximilian Hirst, parapsychologist — I have a ghost hunting kit consisting of a thermometer, string, screwdriver, and bible. Neither the GM (nor I) could come up with ...
Ito Pizarro's user avatar
7 votes
3 answers
364 views

Which technologies/commodities were available during the 30s in the USA? [closed]

I'm going to GM Trail of Cthulhu and would like to know if there is any site that aggregates this kind of information. I've already found this site http://www.paper-dragon.com/1939/; any other ...
thelinuxlich's user avatar
7 votes
2 answers
334 views

Dealing with too powerful forms of transport

I am preparing a game with Call of Cthulhu mechanics using S.T.A.L.K.E.R (the game based on the book Roadside Picnic) as a setting. The game's main locale is an unnatural area that is surrounded by ...
Thamiar's user avatar
  • 1,011
7 votes
2 answers
639 views

Is a Hound of Tindalos stopped by a curve if it has already materialised?

The constraints upon a Hound’s arrival in the present day out of the time stream are clear: it can only materialise through an angle of 120 degrees or less. An entirely curved environment — hiding in ...
RickL's user avatar
  • 1,130
7 votes
2 answers
530 views

Is there a system for determining the difficulty of a combat encounter with a monster is in Call of Cthulhu 7e?

Is there a system to determine how difficult an encounter with a monster or group of monsters is in 7th edition?
user avatar
7 votes
1 answer
1k views

What do I need to start playing Call of Cthulhu 3rd edition?

I'm new to the Call of Cthulhu games and I have been recently looking at all the editions for the games. For some reason the 2nd/3rd caught my eye particularly because of the retro look of it and I ...
Richard Wickliffe's user avatar
7 votes
2 answers
788 views

Help me hide/protect a location in my Call of Cthulhu game

I'm currently writing up a campaign for Call of Cthulhu 7th Edition set in modern day. I've never GMed this system before or any earlier editions, and my knowledge of Cthulhu Mythos and its canon is ...
Wibbs's user avatar
  • 17.8k
6 votes
2 answers
1k views

Making a rules-light non-combat version of Call of Cthulhu

I'm familiar with the very basics of BRP system and I have 6th edition CoC corebook, but right now my schedule doesn't allow me to even glance through it. Aside from the obviously essential skill ...
Matthew Dance's user avatar
6 votes
3 answers
2k views

In Call of Cthulhu, what would you roll to search a room?

In a Call of Cthulhu adventure, a particular clue is concealed in a room. In Trail of Cthulhu, you'd spend a point of Evidence Collection. What would you do in Call of Cthulhu? The rules I have are ...
Graham's user avatar
  • 6,159
6 votes
1 answer
177 views

I am looking for a specific Call of Cthulhu scenario that involves Yog-Sothoth

Sometime in the past I've read a scenario, that I would like to find again. What I remember about the scenario, is that it involved Yog-Sothoth, and a theater. I think (but I am not 100% sure), that ...
Adam Baranyai's user avatar
6 votes
2 answers
710 views

How can I simulate paranoia in a Call of Cthulhu One-Shot?

I'm a new GM to Call of Cthulhu. I want to play a One-Shot where paranoia and hallucinations play a big role (English isn’t my first language, so sorry if some phrases are weird). My idea is ...
ImStupidAndIKnowIt's user avatar
6 votes
1 answer
790 views

Identify a Call of Cthulhu scenario where players start with a blank character sheet

I recall reading about a published Call of Cthulhu scenario which had the following premise: The characters started in an area where they were the only people around A dead body was in front of them ...
Thunderforge's user avatar
  • 15.8k
6 votes
1 answer
1k views

What roll do I call for to resolve feats of strength and other physical challenges?

I'm currently running a Call of Cthulhu campaign and I'm trying to determine what to do with something along the lines of feats of strength and whatnot. I had a character try to crank-start a rundown ...
Crooked's user avatar
  • 61
6 votes
1 answer
487 views

How would a police raid on Ju-Ju House work in Masks of Nyarlathotep?

I've just started Masks of Nyarlathotep with a few friends, and they are half-way through the "America" chapter. The best outcome for this part of the campaign, according to the book, would be to ...
Adam Baranyai's user avatar
6 votes
2 answers
514 views

How many GMs is enough to run a Mega-Game?

My two friends and I are going to spend quite a bit of time preparing a mega-game. It will be a weekend long gaming session with around 20 players, and the three of us as GMs. We are trying to figure ...
sillyputty's user avatar
  • 3,533
6 votes
1 answer
964 views

How do Ghosts regenerate POW?

Ghost have rules to spend POW and what happens when their POW reaches zero but not how to regain those spend points. How can they regain POW is their instantiated state? Should it be something ...
Sardathrion - against SE abuse's user avatar