Early in a run a helicopter flies over Knox County and drags zombies behind it. It does not shoot, but it can turn a quiet street into a horde. This page covers the warning, how it tracks you and how to hide. Updated for Build 42.21 Stable and 42.22 Pre-Release, November 2026.
On the day it comes, the hourly Emergency Broadcast includes “Air Activity detected”, usually at the end of the report and refreshed around 7 AM. The broadcast frequency is random for each world; how to find it is on radio. The exact day is random.
| Behaviour | Detail |
|---|---|
| Phases | Arriving, hovering, searching, leaving |
| Tracking | Follows a living target it can see |
| Losing you | Goes back to searching after about 15 seconds out of sight |
| Hover / search radius | About 50 and 100 tiles |
From one 42.20 guide (one source). It never fires on you. The danger is its engine noise, which pulls every zombie along its path towards whoever it is following. Gunfire, engines and smashing make it worse. Zombie senses are on stealth and noise.
The Helicopter option has four values: Never, Once, Sometimes and Often. Apocalypse uses Sometimes; Rising starts at Never. It only changes how often a pass happens. More on sandbox settings and the lore behind it on lore.
The event is timed from the start of the world (one source: pindrop.gg).
| Setting | When |
|---|---|
| First visit | After 6 to 9 nights |
| Arrival window | Opens between 09:00 and 18:00, stays open 1 to 4 hours |
| Apocalypse, Outbreak, Six Months Later | Once only |
| Extinction | Again every 10 to 15 nights |
| Sandbox: Sometimes | Every 10 to 15 nights |
| Sandbox: Often | Every 6 to 9 nights |
Plan the first week around it: be inside, quiet and away from windows on days 6 to 9 between morning and evening.
On default settings the helicopter can only show up in a nine-hour daytime window on nights 6 to 9. That gives you a simple plan: do your noisy looting in the first five days, then spend days 6 to 9 indoors in daylight, doing the quiet work: reading, sorting loot and cooking.
Leave the radio on the emergency broadcast. When it says “Air Activity detected” you know which day it is, and the other three days are free again.
On a random early day. Listen for “Air Activity detected” on the Emergency Broadcast.
No. It draws zombies with its noise.
Get inside and out of sight; it returns to searching after about 15 seconds without seeing you.
Yes, set Helicopter to Never in the sandbox settings.
Tracking details come from one Build 42.20 guide and are marked. Sources: PZFans helicopter event. Your game is the final word: if it disagrees with us, tell us and we will fix the page.