GURPS Dark Jazz: The Roaring Twenties

The Roaring 20s. The Jazz Age. A period of social and cultural dynamism. In the wake of World War I, jazz music blossomed, the flapper redefined modern womanhood, Art Deco peaked, and the world felt peace longer than any previous time in history. The nascent League of Nations inspired international diplomacy rather than warfare. The era was further distinguished by numerous inventions and discoveries, unprecedented industrial growth, accelerated consumer demand and aspirations, and significant changes in lifestyle.

Campaign Background

Starting year: 1924

Genre: Horror.

Realistic or cinematic? Cinematic

General theme of campaign: Characters investigate supernatural occurrences, uncover conspiracies, battle cultists, and destroy monsters.

Are there multiple planes of existence? Probably.

Campaign’s base city, nation, empire, or planet: Los Angeles, California (Gernsback alternate).

Society/government type: Democratic Republic

Control Rating: CR3. Access to items of LC0 through LC2 is controlled. Characters wishing access to or possession of restricted items will be required to make appropriate rolls in order to acquire the items, whether through legitimate or other means.

Exceptions to general CR:

• Handguns LC2
• Hunting Rifles and Shotguns LC4
• Machine Guns LC1

Tech level: 6+2

Exceptions to general TL:

• Communications: TL7
• Electrical Power: TL8 (fuel cells & advanced batteries)
• Mechanical Power: TL7 (gas turbines)
• Automobiles: TL6 (some TL 8 battery-driven prototypes)
• Railways: TL7 (diesel & electrical)

Technological divergence: Nikola Tesla secured the patents for radio by 1900 and created the first radio network in 1902. By 1924 there are several national radio networks featuring a variety of entertainment and education programs. Local radio, mostly news and information programming sponsored by labor unions and citizen groups, proliferates in most urban areas and some rural locales. Tesla has sponsored experiments by Scottish engineer John Logie Baird attempting to create a system for transmitting moving images. Tesla's successes in electrical engineering logically resulted in other technological advances. Most automobiles and trucks are gas-powered, but powerful electric engines will soon be available for personal vehicles. Most large cities have electric trains, while interstate rail is primarily diesel-driven. Airships are commonly seen in the skies of both America and Europe. They are primarily used for domestic air travel and cargo shipment. Dirigibles provide daily round-trip air service from Los Angeles to San Francisco. A cross-country trip from San Francisco to New York makes stops in Denver and Chicago. The revolution in airship technology was provided by the advent of lightweight steel alloys for the dirigible frames. This technology contributed to mass production of small lightweight airplanes, leading to a civilian aviation boom. Commercial aviation also began to blossom in the 1920s, with more efficient engine and aircraft designs allowing for longer flights.

Brief description of important neighboring powers, political/economic situation, etc.: Advances in electrical engineering spurred by Tesla's inventive progress have resulted in a technological and economic boom for both America and Europe. While early in the decade Germany's economic future seemed uncertain, the Dawes Act and American industrial investment seem certain to restore the country to economic self-sufficiency. American diplomatic efforts in Japan and China promise to forge new international trade alliances, sure to boost the economy to new heights. The future seems bright, for the most part. There is however a growing shadow, a dark force which seems to be gaining power around the world. This force is manifested by the surge of interest in black magic and the occult, and is given further power by cultists and others who worship dark gods and summon malevolent forces. Only a few are aware of this force, the majority of the world happily distracted by the pleasures of the Jazz Age.

Information for Character Creation

Starting point value allowed for player characters: 125

Disadvantage limit: -60

Especially useful character types: Investigator (GURPS Basic, p. 259)

Especially appropriate professions: Private investigator, Miskatonic University student or teacher, journalist, lawyer, occultist, war veteran, mercenary soldier.

PC races allowed: Human

Starting wealth: $12,000

Starting Wealth levels allowed: Any

Starting Status levels allowed: Any

Starting TLs allowed: TL6 (see above for divergence details)

Languages available: English, French, German, Russian, Spanish, as well as others appropriate to character’s educational level and experiences.

Cultural Familiarities available: As languages, plus Japanese, Chinese, Tibetan, and others appropriate to the educational level and experience of the character .

Required advantages, disadvantages, and skills: None

Especially appropriate advantages: Common Sense, Compartmentalized Mind, Danger Sense, Daredevil, Empathy, Fearless, Hard to Kill, Mythos Awareness, Patron (Miskatonic University), Unfazeable

Especially appropriate disadvantages: Alcoholism, Compulsive Behavior, Cursed, Fanaticism, Nightmares, Phobia, Weirdness Magnet

Especially appropriate skills: Dreaming, Hidden Lore (Mythos), Occultism, Speed Reading.

Appropriate Patrons (and base value): Patron (Miskatonic University)

Appropriate Enemies (and base value): Cthulhu Cultists, cost and attributes may vary.

Special Abilities Allowed for PCs:

• Exotic/supernatural traits: See GM.

• Cinematic skills: See GM.

Are PC mages allowed? Yes. Please note the GM is currently working on some variation in the magic system. Please contact the GM if you wish to create a magic-using character. For more on this, please see Magic in Dark Jazz.

General mana level: None. Magic works in some method other than mana. Please see Magic in Dark Jazz for details.

Do areas of higher/lower mana exist? No.

Are any of the spells from Chapter 5 off limits? Yes. Please see Magic in Dark Jazz for details.

Are PC psis allowed? Yes.

Are any of the powers from Chapter 6 off limits? No.

Are PC gadgeteers allowed? Yes.

Are there special limits on gadgeteering? Only those imposed by TL and divergence.

Unusual Background cost(s) for these abilities: None required.

Legal or social restrictions on these abilities: Firearms, explosives, and other regulated materials in gadgets subject to CR/LC restrictions.

Rules and Resources

• GURPS Basic Set, 4th edition
• GURPS High Tech, 4th edition
• GURPS High Tech Pulp Guns 1 and 2
• GURPS Magic, 4th edition
• GURPS Mysteries
• GURPS Voodoo: The Shadow War
• GURPS Cliffhangers, 2nd edition
• GURPS Cthulhupunk
• Secrets of Los Angeles. Los Angeles in the 1920s. Call of Cthulhu sourcebook published by Chaosium.
• Other Call of Cthulhu sourcebooks. Published by Chaosium.

See also

• GURPS Dark Jazz Reboot FAQ
• A Message from the GM Concerning the Dark Jazz Reboot
• Dark Jazz Timeline
• Angel City Times