Coriolis – The Third Horizon

The Dark Between the Stars

Overview

Coriolis: The Third Horizon (CTTH) is a science-fiction RPG from Free League Publishing. Published in 2016, it is one of the earliest implementations of the Year Zero Engine. Inspired by the cultures and aesthetics of Arabia and North Africa, it offers a refreshing alternative to the traditional space opera setting. The player characters are the crew of a starship: free traders, explorers, mercenaries, agents, or pilgrims. Bound together by debt, necessity, and ambition. Every job carries them deeper into the Third Horizon, a cluster of thirty-six star systems linked by mysterious Portals left behind by a vanished alien progenitor race.

Description

The game assumes the PCs are already together as the crew of a starship, though the nature of that crew is entirely up to the players. Characters begin with broad concepts such as Artist, Data Spider, Fugitive, Negotiator, Operative, Pilot, Preacher, Scientist, Ship Worker, Soldier, or Trailblazer. These are concepts and starting points rather than classes: a Soldier might be a legionnaire, a mercenary, a palace guard, or something entirely different.

Key features

The Year Zero Engine

The Year Zero Engine (YZE) is a dice pool system. Players collect six-sided dice based on their attributes, skills, and gear. The dice are rolled, and each 6 is a success. Normally, only one success is needed, with additional 6s indicating a greater degree of success or even triggering a critical effect. Some tasks require more than one success.

Skills & Talents

Characters possess both general and advanced skills, along with talents that distinguish them from one another. Talents may represent exceptional training, unique experience, or even mystical abilities such as reading another person's surface thoughts.

Pray to the Icons

Faith is central to the setting. Every character is born under one of the Nine Icons, each representing different ideals and granting a unique talent. When fortune turns against them, players may Pray to the Icons, rerolling failed dice in hopes of success. Every prayer, however, grants the Game Master a Darkness Point.

Darkness Points

Darkness Points are a resource for the GM, used to increase tension and complicate the story. They allow the GM to introduce narrative twists such as a PC's gun running out of ammunition, an NPC seizing the initiative, or an innocent bystander being placed in danger.

Combat & Criticals

Combat is fast and dangerous. While characters can absorb a fair amount of punishment, critical injuries are the greatest threat. Weapons have a Critical Rating that can trigger rolls on a d66 injury table, producing lasting wounds, or in the worst cases, sudden death.

Active games and players

CORIOLIS
Coriolis
Online
Campaign
LFG Online Coriolis
Players
1/6
GM
0/1
Coriolis
en English

LFG Online Coriolis

Newbie friendly Newbie friendly
Adult Adult
Looking for a group to play Coriolis : The Third Horizon or Coriolis : The Great Dark with. I'm an experienced ttrpg player looking to get into sci fi with this beautifully written and imagined world of Arabian nights in space! Please get in touch if you're interested to get a group going and looking for players! Moraelin

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en English el Greek
DND5E
Dungeons & Dragons 5E
CORIOLIS
Coriolis
...
Online
Nikos
Hi, I'm Nikos, live in the UK, I'm an experienced DND player and GM who has been itching for a new setting! I've been interested in the sci-fi and Arabian nights world of Coriolis and have always wanted to try it! Happy to play online in European times, let me know if you're organising something like that! Thanks!
en English
DND5E
Dungeons & Dragons 5E
...
Denver
Online
mabel
hi! i'm mabel (she/her, 29) forever gm based in denver looking to play some games! willing to join groups solo or with my girlfriend. i've been playing roleplaying games in some form or fashion for over 15 years, but I haven't had enough consistent availability over the years to really form any sort of solid playgroup. i'm hoping to find likeminded folks (leftists of any sort, lgbt+, overall nice people) to explore various games with. some systems that i'm particularly interested in playing are Shadowdark, Cairn & similar rulesets, Coriolis (either edition), Mothership, Delta Green, Vagabond, Vaesen, and Public Access. I have D&D 5e listed on my profile for the sake of showing my experience with it; I'm not interested in playing 5e under most circumstances.  other interests include hiking/camping, reading (mostly fantasy and communist theory), music (i'm a touring artist), and anime/manga.

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