This jam is now over. It ran from 2020-11-01 04:00:00 to 2020-12-07 04:59:59. View 65 entries


2400 is a lo-fi sci-fi RPG featuring starships with CRT monitors, mind-backups on cartridges that get wiped in magnetic storms, and medics hauling around spare-tire-quality cyber-limbs. But more than that, it's a plug-and-play toolkit, each module a microgame that can be printed out on a single page of paper. It's designed to be quick to learn and easy to hack. To facilitate that, it's now got a Creative Commons licensed system reference document (SRD) and layout template, 24XX. So please, by all means: hack away.


Make something for or from 2400. Offer your own interpretation of "lo-fi sci-fi" for use with these rules, or do something else cool with the system, like adventure locations, character options, a xeno-bestiary, or adapting for a new game or setting.

Price it (or not) as  you like. Check out this thread by Dee Pennyway if you want to charge for it and also set up free community copies.

Keep it inclusive. We reserve the right to remove entries for (intentional or unwitting) racism, misogyny, ableism, homophobia, or transphobia, and to update this list as needed to prevent gatekeeping against marginalized people.



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Lo-fi sci-fi micro RPG collection
A lo-fi sci-fi RPG SRD
Lo-Fi Hi-Fantasy RPG. Part of the 1400 plug-and-play micro-RPG series.
24XX hack about vampire hunting in a wasteland world of dark monsters
Lo-Fi Space Vikings
lofi rpg in a city of scum and villainy
Lo-Fi Hi-Fantasy RPG Dungeon Crawl. Part of the 1400 plug-and-play micro-RPG series.
a handy adventure guide for space goons in the year 24XX
Samurai hunting cursed blades
TTRPG about hunting demons in space derelicts
Washington Irving inspired microgame adapted from Jason Tocci's 24XX
Competitive Killing TTRPG
The supernatural is real, and you are here to stop the monsters — an homage and goodbye to a 15-Season journey.
Weird Cosmic Sci-fi RPG
24XX TTRPG where you're a starfighter in an increasingly messy war
Survive climate disaster, fight corps
20th Century Cyberpunk
Adventures in a wild world filled with spirits and weird magic.
Adventures below the waves of a sunken earth.
Cinematic Heist RPG
A 24XX hack based on anomalies and blessed powers
A 24XX game about infiltrating a city that's been overrun with dinosaurs.
Rebuilding community in the distant past.
Corporate industrialpunk soulslike (24XX)
Post Apocalyptic Exploration
Play a team that retrieves dangerous books in this lo-fi surrealist 24xx TTRPG.
Horror-beauty in the vast darkness
Lo-fi rpgs inspired by TRON and Battlestar Galactica
Outlaw picking jobs in the weird west
Fantastical airships
Pirates pursuing fugitives from Davy Jones Locker
24XX hack of nameless gunslingers caught between two gangs in an otherworldy Western setting
Body modification in a steampunk future (24XX)
A 24XX game about going back in time to save the future
A Sci-Fi Time Loop RPG
Free Kriegsspiel roleplaying in a galaxy far, far away...
A super-condensed, lo-fi abstract RPG about planar revolutionaries fighting the system.
Lo-Fi Sci-Fi Tactical Espionage RPG
A 24XX hack where you bring about the end of the world.
A 24XX microgame about civil mechs and an imminent storm
see you later space cowboy
Zone shepherds, nontraditional genders, weird biotech flocks.
A fluffy space raptor RPG
A lo-fi Cyberpunk setting inspired by Repomen and Repo!: A Genetic Opera
A 24XX RPG set within the oceans of a world in the wake of environmental disaster
Play a vengeful goddess and end the world.
Spirits left to wander far grow monstrous fair and old.
a Lo-Fi Food Service game based on 24XX
Cyberpunk Sports miniature game. Get the ball, and avoid the traps and hack your way into the victory!
Bronze axes and minimal sorcery in New Kingdom Egypt.
Gunrunners, rumrunners, flappers and jazz - the age of Prohibition and excess.
24XX hack of exiled elves fighting against Santa’s enemies in lo-fi sci-fi
An entry for the 24XX game jam.
Lo-Fi RPG about exploring the stars.
Survivors forget ideologies post-apocalypse. 24XX-based.
A list of enemies and character backgrounds for 24XX games, especially Tempus Diducit because it's wild.
An unplaytested game for TRUE FANS everywhere
Simple lifepath approach for creating 2400 Cosmic Highways characters
A 24XX game about WW2 partisans