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
New players are welcome, and nobody expects you to know the rules beforehand.
Adult
The table is for players who are 18 or over.
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

Read more

Save to favorites
en English
DH
Daggerheart
PATH1E
Pathfinder 1
...
Online
JamesCORP
Hi, I'm James from the UK. I've been playing and GMing tabletop RPGs for a long time, and I enjoy trying different systems rather than sticking with one game. As you can probably tell from my system list, my tastes are pretty broad! I've played or run everything from Savage Worlds and Dragonbane to Alien, The One Ring, Star Wars, PbtA games, Blades in the Dark and plenty of others. I'm especially interested in Outgunned right now. I enjoy games where the players actually roleplay with each other rather than everything going through the GM. I like character interaction, collaborative storytelling and giving everyone their chance in the spotlight. Combat is great too, especially when it's exciting and has some narrative weight behind it. As a GM, I'm not interested in trying to beat the players. I want to give them situations to interact with, see what they come up with and make their characters look cool while still giving them meaningful challenges. As a player, I bring the same attitude: work with the group, support other people's moments, and help move things forward. I'm UK-based and mainly play online using Foundry VTT and Discord. My availability varies depending on the game, but I'm generally looking for UK/European evening times. I'm also happy playing with people who are completely new to a system. I don't expect everyone to know every rule before we start, especially considering half the fun for me is discovering games I haven't played before.
Save to favorites
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!
Save to favorites

Videos

Reviews

Sorted by:

No reviews yet.

Login to leave a review.

Other entries

Mayday Roleplay
Actual Play & Podcasts

Mayday Roleplay

English
Actual Play
Delta Green
Mayday is an award-winning actual-play channel highlighting indie rpgs with immersive roleplay. Their major campaigns include Delta Green, Vampire: The Masquerade, and The Wildsea.

Read more

The Roost
Actual Play & Podcasts

The Roost

English
Dungeons & Dragons
Actual Play
The Roost is a group of friends who stream D&D actual play through of campaigns along with How to Play tutorials!  Let the good dice roll! Cast: Joanna as Dungeon Master Miles as Vronin Snapfuse John as Talon Harbinger Jackson as Varek Jowl Austin as Kai Baltoris David as Viken Kasholt

Read more

Daggerheart (2025)
Tabletop Roleplaying Games

Daggerheart (2025)

TTRPG
Beginner-friendly
High-Fantasy
Daggerheart is a fantasy tabletop role-playing game published by Darrington Press, an imprint of Critical Role Productions. The game was released in 2025. Description Daggerheart is a story-docused role-playing game system, where the rules direct players to think narratively and not just mechanically. The game uses a system called Duality Dice, where players roll two twelve-sided dice. One for Hope and one for Fear. In addition to determining whether the character achieves success or fails at the action they are trying to perform, it also generates a helpful Hope resource for the player, or a challenging Fear resource for the game master (GM). Lead designer Spenser Starke explained that there is "also no initiative in Daggerheart". It functions very much like a Forged in the Dark or a Powered By The Apocalypse game, where the GM is making moves on certain dice rolls and we're passing play back and forth as a conversation. It all flows together in a way that supports the storytelling-first direction that Critical Role has really embraced over the last decade". The game features 279 supplemental cards to track player abilities and characteristics. Darrington Press also launched several digital resources, including an online custom card creator.

Read more

Looking for a group?

Find a tabletop group to join or players to invite. Groupfinder is a free looking-for-group platform. By players, for players.