Cortex Vortex — a cinematic sci-fi fantasy TTRPG set in the year 5000, by Octokraken
The cinematic sci-fantasy TTRPG set in the year 5000. Become a legend of Terra Sol, with companion bots at your side and the Vortex Flare in your veins.
WHAT IS CORTEX VORTEX
It is the year 5000. The solar system has a name, Terra Sol, and a government that calls itself an alliance. Humanity never stopped, and it never stayed human either. Uplifted animals took Earth. Machines woke up and chose names. People went into the oceans and came back changed.
You sit at a table with three to six friends, one set of dice, and a character you build from the ground up. One of you runs the universe. The rest of you go out into it and find out what you become.
WHAT YOU NEED: FRIENDS, DICE, AN EVENING
HOW IT PLAYS: THE D20 SYSTEM YOUR TABLE ALREADY KNOWS
WHERE IT GOES: ANYWHERE IN THE SOLAR SYSTEM. AND FURTHER.

WHY WE'RE EXCITED
WE BUILT SOMEWHERE WORTH GOING
Twelve worlds, factions with real politics, a currency made of solar plasma, and a network of tracked portals. Nothing here is set dressing. Every location wants something different from your crew.
TERRA SOL · YEAR 5000YOU PICK WHAT YOU BECOME FIRST
Eight species, four classes, and a Flare Ring that lets two players in the same class finish a campaign with almost nothing in common. Identity before statistics, every time.
08 SPECIES · 04 CLASSESIT ACTUALLY PLAYS
Four years of writing, and a book that went through real playtests with real people before any of it was locked. The rules in Edition 1 are the ones that survived contact with a table.
185 PAGES · PLAYTESTED BY HUMANSTHIS IS NOT A CITY.
THIS IS OASIS II.
Capital of the Terra-Solarian Alliance. Tokyo's neon veins, New York's vertical madness, Shanghai's kinetic chaos, Paris's eye, Munich's precision, born from a flare. Innovation, political authority, military command, interplanetary law, finance, and parties that decide who runs the next century.
- 5000THE YEAR EVERYTHING CONVERGES
- 12WORLDS IN THE BOOK
- 08PLAYABLE SPECIES
- 04CLASSES, EACH WITH ITS OWN FLARE RING

YOU ALREADY KNOW HOW TO PLAY

Cortex Vortex runs on the d20 chassis your table has used for years. Same core rolls, same saves, same advantage. Nobody has to relearn a rules system to play somewhere new.
The learning curve is the setting, and the setting is why you came. Bring the whole group over in a single session and spend the evening on the universe instead of the manual.
PLAY TONIGHT.
The complete core engine, all eight species, all four classes, gear, upgrades, and a one-shot adventure that runs in a single evening. You need three to six people, one set of dice, and a table.
NO SPAM · PRODUCTION UPDATES AND PLAYABLE MATERIAL · LEAVE WHENEVER YOU WANT