CRITICAL O2

CRITICAL O₂ A minimal solo derelict survival crawl You are trapped aboard a drifting, dying ship. Something has gone wrong. The lights are failing. The air is running out. Your only chance is to reach your Goal before the oxygen hits zero and the ship finishes what it started. What you need 1d6 This ruleset Paper and pencil 20–40 minutes What you get A hard oxygen clock that turns every decision into a risk Suit Integrity that degrades under pressure Limited Batteries that force hard choices Procedural ship generation with atmospheric room prompts A simple d6 Oracle for all uncertain actions Encounters, malfunctions, leaks, and the quiet dread of a ship that does not want you here No complex inventory. No long rulebook. Just you, the dark, and the slowly emptying tank on your waist. Define a Goal. Draw the map as you go. Search, pry, rest, or run. Every turn costs oxygen. Every failure brings the ship closer. Will you make it to the escape pod… or will the derelict claim another one? Includes Full rules (d6 Edition) Quick Start Guide Room Narrative Prompts Survivor Log / Character Sheet Print-friendly player aid Lean. Atmospheric. Unforgiving. Credits CRITICAL O₂ A minimal solo derelict crawl Design & Writing Drag 'Em Studios, WizardOfOdd 2026 https://dragemstudios.neocities.org/ System d6 Oracle Inspiration Classic sci-fi horror, solo RPG design, and the quiet terror of running out of air. Special Thanks To everyone who plays in the dark and keeps rolling. Version 1.2 For solo play.