You are trapped aboard a derelict, drifting spaceship. Something has gone terribly wrong. Your only hope is to reach your Goal before your oxygen runs out and the ship claims you.
CRITICAL O2 strips solo dungeon-crawling down to its rawest form: one d6 Oracle, one Event Die, a ship you map as you go, and an oxygen supply that never stops counting down. Every Search, every Pry, every step into a new compartment costs air you can't get back. Turns run roughly ten minutes each — Orient, Act, Resolve, Event Die, lose Oxygen — a tight loop built to keep the tension climbing until you either reach your Goal or run out of breath in the dark.
- > Define a Goal with 3 Progress Steps, then map the derelict compartment by compartment as you explore
- > Resolve every uncertain action on the d6 Oracle, from Disaster on a 1 to Critical on a 6
- > Manage Suit Integrity and Batteries — go Tired, then Exhausted, and your options start disappearing
- > Roll the Event Die each turn for Encounters, malfunctions, oxygen leaks, and worse
- > Escape with your Goal complete — or don't. Death occurs when the fiction demands it.
Includes Core Rules, a Player Aid reference sheet, a Quick Start Guide, and a full set of Room Narrative Prompts for atmospheric read-aloud text as you explore.
CRITICAL O2 is live now on itch.io.
View on itch.io →