All Sandbox Settings
Project Zomboid gives you enough sliders to build anything from a forgiving co-op survival save to a brutal migration-heavy nightmare. The trick is not to change everything at once. Tune the world in passes: threat, resources, progression, then maintenance.
Free tool: For ready-made starting points, the free Project Zomboid config recipes bundle these sandbox settings into tested presets (vanilla-plus, co-op relaxed, hardcore Louisville) you can import and tweak.
Start With The Four Big Buckets
| Zombie population | Controls how dangerous roads, towns, and recovery runs feel. Population, redistribution, and respawn together decide whether the world becomes emptier or keeps refilling. |
|---|---|
| Loot and rarity | Food, medicine, literature, and weapon scarcity change the pace of the first month more than almost any combat setting. |
| Character progression | XP multipliers, multi-hit, nutrition, and reading speed determine whether the server feels like a long campaign or a fast sandbox. |
| World persistence | Water, power, erosion, farming speed, and corpse removal affect how manageable the late game becomes. |
What each built-in preset actually sets
Project Zomboid ships five sandbox presets, and the differences between them are not what most guides say. Every value below is read straight from the shipped build (lua/shared/Sandbox/<Preset>.lua, build 24909836), with the option names taken from the game's own English strings rather than translated by hand.
| Setting | Apocalypse | Six Months Later | Outbreak | Rising | Extinction |
|---|---|---|---|---|---|
Zombie CountZombies | Normal | Insane | Normal | Low | High |
Zombie RespawnZombieRespawn | None | inherits default | None | Low | Normal |
Day Length (in real time)DayLength | 1 Hour, 30 Minutes | 1 Hour | 1 Hour, 30 Minutes | 1 Hour, 30 Minutes | 1 Hour, 30 Minutes |
Start MonthStartMonth | July | December | July | July | July |
Months since the ApocalypseTimeSinceApo | 0 | 6 | 0 | 0 | 0 |
Electricity ShutoffElecShut | 14 - 30 Days | Instant | 14 Days - 2 Months | 14 Days - 2 Months | 14 - 30 Days |
Water ShutoffWaterShut | 2 | 1 | 3 | 3 | 2 |
Darkness during nightNightDarkness | Normal | Normal | Normal | Normal | Pitch Black |
Weapon Multi HitMultiHitZombies | false | false | true | true | false |
Starter KitStarterKit | false | false | false | true | false |
The one that surprises people: Apocalypse does not have the most zombies. It runs the Normal population setting. Six Months Later runs Insane. The game states the multipliers behind those labels in its own help text: Insane 2.5, Very High 1.6, High 1.2, Normal 0.65, Low 0.15, None 0.0. So Apocalypse is roughly a quarter of the population of Six Months Later. What makes Apocalypse hard is everything else: respawn set to None, so the world you clear stays clear and there is no refill to farm, combined with the slower, tougher zombie profile.
Rising is the gentlest on numbers (Low, 0.15) but is the only preset that switches on a Starter Kit and Weapon Multi Hit, so it plays fast and forgiving rather than empty. Six Months Later starts in December, six months after the outbreak, with power already gone: that is why it feels harsh despite generous nature abundance.
These are starting points, not fixed difficulties. Any of them can be opened and edited, and the categories above are the order to do it in.
A Safe Tuning Workflow
- Set a clear goal first: relaxed co-op base building, high-risk public server, or roleplay economy.
- Adjust zombie numbers and movement before touching weapon or XP settings. Threat should be solved at the source.
- Balance food, literature, and generator access next so the opening week matches the danger level you chose.
- Run a short test save or invite a small group before promoting the configuration as your permanent world.
- Write down every important change. A settings file becomes hard to reason about once several admins make edits without notes.
Recommended Direction By Server Style
| Friends-only co-op | Lower respawn, normal loot, modest XP boost, and longer shutoff timers reduce busywork without removing survival tension. |
|---|---|
| Persistent public server | Keep loot near default, avoid extreme XP, and use moderate zombie redistribution so towns never stay permanently empty. |
| Hardcore challenge | Raise migration pressure, shorten utilities, slow reading, and leave vehicle condition unforgiving so bad planning matters. |
| Roleplay community | Reduce instant death spirals, keep loot mixed, and emphasize farming, injury recovery, and slower zombie respawn over raw body count. |
Verified 2026 Detail
Project Zomboid's public unstable branch notes in March 2026 say the default game modes are being refreshed while Build 42 work continues. That matters for sandbox admins because preset names can evolve even when the underlying custom levers stay familiar, so it is safer to review each imported preset after a branch switch than to trust the label alone.
Current Official Note
As of March 2026, The Indie Stone's official site still separates the long-running stable branch from the newer unstable Build 42 line, and the March 2026 news posts say the default game modes are being refreshed while Custom Sandbox remains fully supported. That means sandbox presets can drift between branches even when your deeper custom values stay conceptually the same.
Need a stable place to test changes before you touch a live world? Launch your Project Zomboid server with Supercraft.
Build it the easy way: our free Project Zomboid Build 42 Server Settings Generator turns presets plus a simple form into a ready-to-drop servertest_SandboxVars.lua and the servertest.ini basics. Paste an existing config to see exactly how it differs from a preset.