99 Nights in the Bunker Guide: The day-night loop
About
Overview99 Nights in the Bunker is a co-op survival game where you and your friends must last 99 nights against monsters that roam outside after dark. Each day you loot a supermarket, manage your generator, furnish your bunker, and search for missing survivors scattered across the map.
What is on this page
Contents
The day-night loop
Step
The game runs on a strict day-night cycle. During the day you head out to the supermarket and collect whatever your bunker needs. When night falls, monsters appear outside and you must be inside the bunker. Back inside, you fuel the generator and place any furniture you brought back, then the next day begins.
- Head to the supermarket gather food, fuel, and furniture before nightfall.
- Return to the bunker before the night phase starts.
- Fuel the generator top it up so the power stays on through the night.
- Place furniture arrange what you collected to raise your bunker's rating.
Supermarket looting
Tips
The supermarket stocks food, fuel, and furniture. In co-op, splitting up lets the group cover more ground in the same amount of time.
- Fuel — a dead generator means no power.
- Food — keep enough on hand to sustain the players in the bunker.
- Furniture — grab it to raise your bunker's rating and unlock new rooms.
- Split the store with friends — assign one person to each category so nothing is left behind.
Generator management
Warn
The bunker runs entirely on the generator. Without fuel it loses power. Build a habit of checking the fuel level every night.
Expanding the bunker with furniture
Step
Placing furniture raises your bunker's rating, and once that rating hits certain thresholds, new rooms open up. You choose the layout freely.
- Bring furniture back from the supermarket.
- Place it inside to increase the bunker's rating.
- Unlock the next room once the rating threshold is reached, a new area becomes available.
Finding the missing survivors
CheckSurvivors are hidden in different spots across the map. Searching during the day keeps you safe, and co-op groups can cover more of the map by spreading out.
- Only search during the day monsters roam outside at night.
- Cover different areas split the map between friends.
- Survivors are spread across the whole map.
- Share information call out where each survivor was found.
Glossary
Glossary- Bunker
- Your team's base, where everyone must shelter at night to avoid monsters; furnishing it expands it over time.
- Supermarket
- The outdoor location you loot during the day for food, fuel, and furniture.
- Generator
- The machine that powers the bunker; it needs fuel or the lights and equipment shut off.
- Bunker rating
- A measure that rises as you place more furniture, unlocking new rooms when it crosses set thresholds.
- Survivors
- Missing people hidden across the map that your group searches for as one of the game's main objectives.
- Day-night cycle
- The game's core rhythm: active exploration during the day, mandatory shelter inside the bunker at night.
Common questions
FAQDo you fight the monsters?
No. The monsters roam outside at night, and the way to deal with them is simply to stay inside the bunker once the night phase begins.
Can you play solo?
Yes, the game can be played alone.
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