How to play

• WASD Move
• Shift Sprint
• C Sneak
• F Hand lamp
• E Use, pick up the Heart or an item
• G Put the Heart or an item down
• Tab Map (hold)
• V Push to talk (hold)
• M Sound
• Mouse Aim, click to attack
• Middle click Ping a spot

• The Heart is overheating. Carry it into the right cooling shaft before time runs out: E picks it up, G puts it down. With it you walk at half speed and your hands are full (no attacks, no items), and it burns 20 health a second unless you wear a hazmat suit. Whoever dies, goes out or crawls into a tunnel with it drops it on the spot.
• Every family (player color) has notes hidden in the dark (2 by default), like "It is not the red shaft." or "It is the green or the blue shaft." Anyone can find a note, but only its family can read it: call them over. Together the notes pin down the working shaft.
• The war-ministry agents lie about their notes and want the Heart to blow. With 3 or more players there are roles; with fewer it is a practice round.
• Killing someone is accusing them: kill a resident and you are out too.
• Everyone starts with a knife. Items lie hidden in the dark: pistols, shotguns, stones, signal flares, electro-revivers, loupes, steam canisters and hazmat suits. Press E next to one to take it (you carry one at a time and put the old one down). The electro-reviver (E at a body) brings someone back, the loupe (E at a body) shows how and when they died, the steam canister (E) releases a cloud that hides you, and a click puts on a hazmat suit: 60 seconds against the Heart's heat, with your hands free again.
• A stab takes half your health, a pistol shot all of it, and a pistol and a shotgun have one shot each. Click throws a stone (it makes a noise where it lands) or a signal flare (it lights the area for 10 seconds); G puts an item down. Others only see your weapon or item while you use it.
• Sprinting on empty stamina costs health, and can kill you. C sneaks without a sound (press again or sprint to stop).
• F switches your hand lamp off: wardens and players see you much less, and you see less too. Its dry cell lasts about 90 seconds of light and recharges while it is off.
• Clockwork wardens stand watch at the cooling shafts and wake when someone comes close. Wet feet leave footprints for a few seconds, also when you sneak. Middle click pings a spot for the players who can hear you.
• The air-raid siren button (E) sets off a siren and a red light for 5 seconds; it needs 30 seconds to recover. Agents can crawl between service tunnel hatches (E).
• Out of the round? Walk around as a ghost: only other ghosts see and hear you.
• The cooling shafts open after a while (90 seconds by default).