The Ultimate Agility Guide

Chapter 1

Agility in Build 42

4 skills decide how fast you move and how much noise you make doing it. Together they are the difference between being chased and being ignored.

The ghost's loop

1. CrouchNear zombies, unseen.
2. MoveEvery step near them is XP.
3. Combat stanceWalk it around base for Nimble.
4. RunOn safe roads for Running.
5. EscapeBecause you can.

Chapter 2

Build your runner

Agility levels come from jobs and traits, and from the sneaking you do anyway.

The Grady v King VHS gives Lightfooted XP. Agility skills have no skill books.

Chapter 3

How zombies notice you

2 senses. Sight first, then sound.

• Sight. Line of sight is the main way zombies find you. Low fences and parked cars block it while you crouch. Weather shrinks how far they see.
• Sound. Your footsteps have a radius. Zombies in it have about a 50% chance to hear each step when you are not sneaking. Sandbox: Hearing Indoors, the radius is halved.
• Fights, doors, cars and guns are far louder than any footstep. Stealth does not cancel them.

Chapter 4

Running

The old Sprinting skill. Faster, longer, cheaper running.

• Each level raises run and sprint speed and lowers the stamina cost.
• XP comes at random intervals while running or sprinting, split evenly with Fitness.
• Only moving counts. Running into a wall does nothing.

Chapter 5

Lightfooted

Quieter footsteps, no matter how you move.

• Lowers footstep noise while walking, running and crouching. The level factor goes from about 0.99 down to about 0.20 at 10.
• Also boosts Sneaking, making zombies more likely to ignore your steps entirely.
• XP comes from moving near zombies without being detected. More zombies nearby means more XP.

Chapter 6

Nimble

The combat safety skill. Faster in combat stance, quieter everywhere.

• Combat stance is holding the aim key (Left Ctrl or right mouse) with a weapon.
• Higher Nimble means faster movement in that stance. Backpedaling from a group becomes safe.
• Its footstep reduction goes from ×1.0 to ×0.5, and it applies to all movement, stacking with Lightfooted.
• XP: walk in combat stance while actually changing position. No zombies needed.

Chapter 7

Sneaking

Being seen less while crouched, and quieter crouch steps.

• Lowers the chance zombies spot you while sneaking.
• Its crouch noise factor goes from about 1.14 at level 0 to about 0.48 at 10.
• XP: sneak near zombies while unseen. Zombies already chasing you give much less.

Chapter 8

The noise stack

Footstep noise is a chain of multipliers. Every skill and trait stacks.

Everything maxed, crouch steps are about 99% quieter than base. Zombies still see. A door, a fight or a car engine still gives you away.

Chapter 9

Combat stance: the safety skill

Why Nimble is rated one of the best survival skills.

1. In a fight, you back up while swinging.
2. Low Nimble: you shuffle. The group closes.
3. High Nimble: you glide. The group never reaches you.

Chapter 10

Crossing open ground

Practical stealth. Skills help. Routes matter more.

• Crouch along the shadow side of low fences and parked cars.
• Use fog and rain to cross streets. They cut sight range, not hearing.
• Keep a stamina reserve. Crouching costs more than walking. An exhausted crouch-run gets you spotted when you stop.
• When the helicopter comes, get indoors and stop everything loud.

Chapter 11

Traits that change everything

Chapter 12

Training plan: 0 to 10

No books. Movement is the grind. Make it a habit, not a session.

Level by level: Sneaking, Lightfooted, Nimble, Running

The best single thing to do at each level. Read the matching book first when one exists.

Your ticks are saved in this browser, on this device only.

Chapter 13

Tips, tricks and fixes

20 tips from the shadows

Setup

1. One starting point in your main agility skill.
2. Gymnast, Graceful or Runner.
3. Never take Clumsy or Conspicuous for a stealth character.
4. Watch Grady v King for Lightfooted.
5. Check the sandbox hearing and sight settings.

Moving

6. Crouch near zombies, always.
7. Combat stance on every base chore.
8. Jog safe roads.
9. Fences and cars block sight.
10. Fog is for crossing, not sprinting.
11. Keep stamina for the escape.
12. Indoors halves your noise.

Training

13. Alarm clocks make crowds. Crowds make XP.
14. Unseen is the rule. Chased is no XP.
15. Moving is the rule. A corner is not XP.
16. Nimble needs no zombies.
17. Running shares XP with Fitness.
18. Barefoot is quiet and dangerous.
19. Stance is louder than crouch.
20. Doors, cars and guns beat any stealth.

Fix-it table

Chapter 15

Words and sources

Ghost's word list

Combat stance

Holding aim with a weapon out.

Line of sight

Whether a zombie can see you.

Sound radius

How far a footstep carries.

Detected

A zombie has noticed you. No stealth XP now.

Running

The Build 42 name for Sprinting.

Graceful, Inconspicuous

The 2 stealth traits.

Alarm clock class

Pulling a crowd on purpose to train near it.

How sure are we?

Every fact here was checked in September 2026 for game version 42.20.4. Order of trust: the official wiki, then well-sourced fan guides, then player reports.

• What each skill does and how XP is earned, the 50% hearing rule, barefoot halving, alarm clock training, the 4× starting point rule and the Running gain table. Confirmed on the official wiki.
• The multiplier numbers in the noise stack. Fan guides citing 42.18-era wiki data, cross-checked on 42.20.0. Approximate.
• Combat stance being louder than crouch. A fan guide.
• Job and trait values. May change.

Sources

• PZwiki (the official wiki): Nimble, Lightfooted, Skill
• Steam Community guide: All Crafting, Farming and Survival Skills XP Gains, Build 42.20
• Build42guide.wiki stealth and noise guide
• PZfans Lightfooted and skills guides for 42.19
• Bamboo Gaming skills database
• Projectzomboid.wiki stealth and noise guide