Saber Interactive's four-player co-op shooter runs on the Swarm Engine, which pours hundreds of zombies down stairwells and lets them climb over each other into living ramps. The Aftermath release of 21 September 2021 folded in first-person mode, the Vanguard class and two extra episodes set in Rome and Kamchatka. Eight classes, a three-tier weapon system and difficulty steps that run up through Extreme, Insane and Extinction sit on top of missions that take roughly 25 to 40 minutes each.
This guide covers everything you need: core mechanics, the best characters, weapons worth investing in, location progression, and the tips that actually make a difference.
Core Mechanics
Swarm Engine zombie pyramids
The engine tracks hundreds of zombies at once and lets them stack into ramps that reach balconies and rooftops within seconds. Cutting the base of a pyramid with a grenade, a Thumper GL round or sustained machine gun fire collapses the whole stack instead of trimming the top.
Eight classes with perk trees
Gunslinger, Hellraiser, Slasher, Medic, Fixer, Exterminator, Dronemaster and Vanguard each hold a separate progression track. Perks unlock by class level and you pick one per column, so even a maxed class forces a choice between, for example, more ammo and faster reloads.
Weapon tiers and Advanced User
Guns run from Tier 1 starters such as the Gal 9 Compact SMG up to Tier 3 pieces like the Keris V10 and HW416, with heavy weapons in a bracket of their own. The Advanced User perk hands you the fully kitted variant, which on the ARK-103 means a silencer and explosive rounds without spending a single upgrade token.
Defence phase fortifications
Most missions end in a hold where the team sets barbed wire, electric fences, mounted guns, sentries and mortars into fixed emplacement slots before the swarm arrives. The pool of placements is smaller than the number of approaches, so covering the two widest lanes beats spreading gear thin.
Special zombie roster
Bulls in riot gear charge and pin, Lurkers hide and tackle, Screamers drag the horde onto your position, Gasbags leave a poison cloud when killed and Infectors spit corrosive fluid from range. Each has its own audio cue, and calling them the moment you hear them is what separates a clean run from a wipe.
For a deeper dive into how these systems interact, see our World War Z combat guide.
Characters Overview
| Role | Tier | Playstyle | Key Stats |
|---|---|---|---|
| Gunslinger | A | Versatile approach | Balanced stats |
| Hellraiser | A | Versatile approach | Balanced stats |
| Medic | A | Versatile approach | Balanced stats |
| Fixer | A | Versatile approach | Balanced stats |
| Vanguard | A | Versatile approach | Balanced stats |
For full build breakdowns with gear and stat priorities, see our World War Z builds guide. For rankings, check the tier list.
Weapons Guide
| Weapon | Why It Matters | Best For |
|---|---|---|
| ARK-103 Assault Rifle | A Tier 2 rifle with heavy stopping power that stays controllable in long bursts. | Gunslingers holding a mid-range lane and anyone who wants to avoid pulling extra spawns with muzzle noise |
| Keris V10 Advanced SMG | The Tier 3 submachine gun modelled on the KRISS Vector, with a fire rate rated at 90 and the magazine to back it. | Clearing dense packs inside buildings on Tokyo and Moscow, and for Medics who need to stay mobile |
| S890 Combat Shotgun | A Tier 2 pump that removes Lurkers in a single shell and knocks back anything that gets inside five metres. | Doorway defence, Lurker deletion, and Vanguards covering the gap when their shield expires |
| Thumper GL Grenade Launcher | A heavy weapon that clears an entire pyramid in one shot and staggers Bulls. | Breaking a stacked pyramid during a defence phase before it reaches the balcony |
| Mk110 Sniper Rifle | A Tier 2 scoped rifle that kills Gasbags and Infectors before their attacks land. | Open sightlines in Jerusalem and Kamchatka where specials appear well before the horde does |
ARK-103 Assault Rifle: A Tier 2 rifle with heavy stopping power that stays controllable in long bursts. Taken with the Advanced User perk it arrives silenced and loaded with explosive rounds, which is why most Extreme lobbies treat it as the default.
Keris V10 Advanced SMG: The Tier 3 submachine gun modelled on the KRISS Vector, with a fire rate rated at 90 and the magazine to back it. Recoil climbs fast, so short bursts at the base of a stack work far better than holding the trigger.
S890 Combat Shotgun: A Tier 2 pump that removes Lurkers in a single shell and knocks back anything that gets inside five metres. Reload speed is the weak point, so top it up between waves rather than mid-swarm.
Thumper GL Grenade Launcher: A heavy weapon that clears an entire pyramid in one shot and staggers Bulls. Ammunition is scarce and shots too close to the team hurt allies, so it is a horde tool rather than a general purpose gun.
Mk110 Sniper Rifle: A Tier 2 scoped rifle that kills Gasbags and Infectors before their attacks land. It is close to useless in a swarm, so treat it as a special-killer and carry something automatic as a secondary.
Full breakdowns in our World War Z weapons guide.
Location Progression
| Location | Level Range | Key Rewards |
|---|---|---|
| New York | Any difficulty, comfortable from class level 1 | Early weapon unlocks, first class levels, safe practice against Bulls and Lurkers |
| Jerusalem | Recommended class level 5 and up | Sniper and battle rifle practice, wide fortification positions, high special zombie density |
| Moscow | Recommended class level 10 and up | Close-quarters weapon experience, tight defence phases, heavy Lurker spawns |
| Tokyo | Recommended class level 15 and up | Exterminator and Slasher progression, vertical fights, Gasbag-heavy encounters |
| Rome | Recommended class level 20 and up | Aftermath-only progression, Vanguard shield practice, the largest defence phase in the campaign |
New York: The opening episode, running through Manhattan streets, a subway and an apartment block toward a rooftop evacuation. Sightlines flip between long avenues and cramped stairwells, which makes it the best place to learn how pyramids form.
Jerusalem: Rooftops, market alleys and a long descent through the old city, with more open ground than New York offers. Zombies pour over low walls from several directions at once, so fortifications need to face outward rather than down one lane.
Moscow: Snowbound streets, an underground metro section and a set of interior holds with very short sightlines. Shotguns and submachine guns outperform rifles here, and Screamers hidden in the metro tunnels punish sloppy pushes.
Tokyo: Dense urban blocks and interiors where the horde reaches you from stairwells and windows simultaneously. Fire builds shine because the corridors are narrow enough that a single Molotov blocks an entire approach.
Rome: Added with Aftermath, this episode ends in a last stand around Vatican City with some of the largest single swarms in the game. Ammunition management decides the run, which is why a Fixer is close to mandatory on the higher difficulties.
See our maps & locations guide for detailed area breakdowns and our walkthrough for the optimal progression path.
Tips That Actually Matter
- Aim at the bottom of a climbing pyramid rather than the zombies already at the top. Removing three or four bodies at the base drops everything above them, while headshots on the upper layer just get replaced by the next climber.
- Learn the audio cues before the visuals. A Screamer's shriek, a Bull's roar and the wet click of a Lurker all arrive before the model does, and calling the type out loud lets whoever has the shotgun turn to face it.
- Kill Gasbags at range and never in a doorway your team has to walk through. The poison cloud lingers long enough to strip most of a health bar from anyone who pushes into it.
- Bring a Fixer to any Extreme or Insane run. Ammunition, not damage, is what ends those attempts, and the class turns a squad that runs dry midway through the final hold into one that keeps shooting.
- Spend fortification placements on the two widest approaches instead of covering every slot. Barbed wire on a narrow corridor that already funnels enemies is wasted, while an electric fence on an open plaza buys the team ten seconds.
- Grind class levels on Normal or Hard before touching Extreme. Perk columns matter more than raw aim, and a class below level 15 is missing the ammo and damage nodes that make the difficulty survivable.
- Silenced weapons genuinely reduce how many extra zombies you attract. The ARK-103 with Advanced User is popular partly because it lets a Gunslinger hold a lane without waking the block.
- Do not melee more than two or three zombies in a row unless you are playing Slasher. Melee stamina drains fast and a tired swing does a fraction of its damage, which is how players get pinned in the middle of a pack.
- Save the heavy weapon for Bulls and for pyramids during the final defence. Firing a Thumper GL or MGL into ordinary trash zombies wastes the only tool that reliably staggers armoured specials.
- Stay inside a room with a single entrance during a swarm rather than in an open street. The zombies will still climb to reach you, but one door means one firing arc rather than four, and it makes the fortification budget go much further.
Common Mistakes to Avoid
- Shooting the top of a horde pyramid instead of the bodies holding it up, so the stack keeps rebuilding faster than you can clear it.
- Jumping into Extreme or Insane at low class level, before the perk columns that carry those difficulties are unlocked.
- Killing a Gasbag next to the team and blanketing the only exit in poison gas.
- Emptying the heavy weapon into ordinary zombies and having nothing left when the Bull charges the defence position.
- Placing fortifications in every available slot rather than concentrating them on the two lanes the swarm actually uses.
Frequently Asked Questions
How many classes does World War Z have?
Eight. Gunslinger, Hellraiser, Slasher, Medic, Fixer, Exterminator and Dronemaster came first, with Vanguard added in the Aftermath release on 21 September 2021.
Which class should a new player start with?
Gunslinger. Its perks all feed one weapon, so you learn the maps and the special zombies without also learning drone management or shield timing. Medic is the second easiest because the Stim Pistol works from a safe distance.
Is there a first-person mode?
Yes. Aftermath added an optional first-person view alongside the original third-person camera, and you can switch between them.
What is the best weapon in the game?
Most high-difficulty lobbies point at the ARK-103 assault rifle taken with the Advanced User perk, which supplies it silenced and with explosive rounds. The Keris V10 is the pick if you want a Tier 3 submachine gun instead.
Can I play the campaign solo?
Yes. Any of the missions in New York, Jerusalem, Moscow, Tokyo, Marseille, Rome and Kamchatka can be run with AI teammates, though the bots will not manage fortifications or specials as well as a coordinated squad.
More World War Z Guides
- World War Z Best Builds
- World War Z Tier List
- World War Z Walkthrough
- World War Z Beginner's Guide
- World War Z Tips & Tricks
- World War Z Weapons Guide
- World War Z Combat Guide
- World War Z Boss Guide
- World War Z Maps & Locations
- World War Z Crafting Guide
- World War Z Classes & Characters
Similar Games
If you enjoy World War Z, check out these related guides:
- Helldivers 2 Guide: action game with similar mechanics
- Black Myth: Wukong Guide: action game with similar mechanics
- Monster Hunter Wilds Guide: action game with similar mechanics
