24XX
24XX is a rules‑lite sci‑fi toolkit SRD: pick a die, roll high, keep play fast, and favor clear fictional positioning over build math. Classless, ultra‑hackable, and ideal for one‑shots or quick campaigns, it powers 2400’s lo‑fi modules but adapts to any genre.
Science Fiction • Needs GM • 2/5 complexity • One-shot friendly • None prep
Resolution favors clarity and speed: roll the indicated dice, take the best result, and move on. Difficulty tweaks are minimal, keeping arithmetic low and pacing high.
Theme and Setting
Character concepts are classless; gear and tags do the heavy lifting. Procedures emphasize rulings over rules , with oracles and prompts standing in for subsystems.
How Play Feels
Fail‑forward outcomes, advantage/disadvantage style tweaks, and concise clocks/complications keep scenes moving. 24XX is built to publish : it ships with a plain‑text SRD, layout templates (Affinity/InDesign), a Google Slides version, and a CC‑BY logo for compatibility marks.
What Makes It Distinct
You want denser mechanical crunch or build complexity You want the system to stay almost invisible at the table. You want denser mechanical crunch or build complexity You want the system to stay almost invisible at the table.
Where It May Not Fit
You want denser mechanical crunch or build complexity You want the system to stay almost invisible at the table.