Meta events in Project Zomboid

Meta events are sounds the game plays somewhere off screen to make the world feel occupied and to shuffle zombies around the map. Nobody is actually there. You hear a burst of gunfire, a scream or an alarm in the distance, and zombies within earshot of that point start walking toward it. The helicopter is the loudest and best known of these events, but it has its own setting and its own page.

The events matter because they move zombies you have not met yet. A quiet street can fill up after a distant shot, and a horde drifting toward a sound may pass right by your base. For how groups of zombies form and travel, see hordes. For the zombies themselves, see zombies.

Build 42 keeps the same basic system as Build 41. The main change players notice is in the settings menu: the Meta Event option now offers only three choices, covered below.

The gunshot event is the one sources agree on most: it is a one-off sound that lures zombies over a wide area in the general direction of the shot. Players who have tested screams and barking report mixed results. One player watched zombies outside a house stay put after a scream, while another saw most local zombies head toward a scream next door. Treat screams as possibly attracting and plan for the worse case.

The helicopter is a scheduled flyover. On default Apocalypse settings it usually comes once, most often somewhere around days 6 to 9 and during daylight. It does not shoot. The danger is its engine noise: if it spots you outside, it tracks you and every zombie under its path follows the sound. If you are indoors and out of sight, it usually loses interest. The emergency broadcast on the radio often warns of air activity on the day it comes, so a working radio is worth having by then.

Its own sandbox setting has four choices: Never, Once, Sometimes and Often, with Once as the Apocalypse default. Full tactics for hiding, leading it away and cleaning up afterwards are on the helicopter page.

Some buildings have alarms, and they can trip without you touching them. In Apocalypse the Zombie House Alarm Triggering option is on, so a zombie that breaks a window or door of an alarmed house can set it ringing. The result is the same as if you had done it: a long, loud noise that pulls zombies onto that block. If the alarmed house is next to your base, the crowd it draws becomes your problem.

Players also report hearing house alarms from buildings nobody went near, which fits the meta event idea of random noises that shift zombies around. We could not confirm from a Build 42 source exactly which alarms count as meta events and which are tripped by zombies, so that detail is listed in the check box below.

Car alarms are usually set off by the player, for example when breaking into or hotwiring a car that has one. How long alarms ring, how to spot alarmed houses and how to use an alarm as a lure are covered on the alarms page.

The meta event options sit in Sandbox Options under the Sadistic AI Director section, alongside the helicopter. Three settings are worth knowing:

Older guides mention labels like Low, Rare or High for these settings. Those are out of date; Build 42 shows only the choices above. The Meta Event setting is separate from the helicopter, so turning meta events to Never does not stop the chopper, and turning them off does nothing about zombies already at your door.

On a server, change the values in the world's sandbox file and restart. Changing a preset in the menu after the world exists does not change a running save. The full list of options is on the sandbox settings page, and suggested values are on recommended settings.

Opinion Leave Meta Event on Sometimes for a normal run. The events are part of what keeps an area from staying cleared forever, and Often can feel like a constant stream of strays early on. Players who want a calm start or a building-focused game have good reason to pick Never.

A meta event works like any other loud sound. Zombies that hear it walk toward where it came from. The Follow Sound Distance setting, 100 by default in Apocalypse, decides how far a zombie keeps walking toward the last sound it heard once it has picked it up. Zombies that reach the spot and find nothing mill around there, which is how small groups clump into larger ones.

The direction is the key point. An event on the far side of town can pull zombies away from you. An event on the far side of your base pulls them straight through it. Following the sound gains you nothing: players report there is usually no loot or firefight to find at the source, only the zombies that gathered there.

Meta events are also not the same as respawn or migration. Zombies drifting into empty areas after a set number of hours is a different system, covered on the zombie respawn page.

Opinion The right reaction depends on which way the sound came from and where you are.

• Note the direction. Turn your attention to where the sound came from. If it was beyond your base, expect zombies to walk past or through it in the next few minutes.
• Get out of the path. If you are outside, move off the line between the crowd and the sound, or step indoors until it passes. Crouch and walk rather than run; see stealth.
• Stay quiet at home. A passing group often keeps walking if nothing new catches its attention. Hold off on hammering, shooting or running the car until it has gone.
• Do not go and look. The source is empty. Walking toward it puts you where the zombies are gathering.
• Use it. A distant event can thin out the area you wanted to loot. Wait a little, then go the other way.

Sturdy defenses make all of this calmer. Boarded windows and doors give drifting zombies less reason to stop, as explained on barricades and safehouses.