ZOMBIE INC – QUEST SYSTEM GUIDE
Simple Player Guide
Status:  LIVE
 

WHAT ARE ZOMBIE INC QUESTS
Zombie Inc adds custom quest types with unique objectives, rewards, and progression. These are separate from vanilla trader quests and include boss hunting, wave defense, survival endurance, vehicle recovery, intel gathering, story rituals, and nest demolition.

HOW TO GET QUESTS
Zombie Inc quests are taken from traders. Quest difficulty is organised into tiers (1–6). Higher tiers increase difficulty and reward value.

THE 7 QUEST TYPES

1. HUNT QUESTS (Boss Hunting)
   Objective
   
   

• Travel to a POI, eliminate a specific boss, return for rewards
  
  

How it works

• Trader assigns a random POI location
  
  

• Rally point marks the mission area
  
  

• Boss must be killed while remaining within 60 meters of the rally point
  
  

• Return to trader to complete
  
  

Tiers

• Tier 1–5: Normal bosses
  
  

• Tier 6: Infested bosses (harder, better rewards)
  
  

Rewards (typical)

• XP (approx. 4,000–10,000+)
  
  

• Casino Coins (approx. 700+)
  
  

• Boss Score progress
  
  

• Boss body loot
  
  

• Hunt magazines (chance)
  
  

• God Slayer Path books (after challenges unlock)
  
  

Notes

• Infested bosses grant 5x Boss Score value
  
  

• Completion of normal boss kills unlocks access to infested hunt progression
  
  

2. DEFENSE QUESTS (Wave Defense)
   Objective
   
   

• Hold a location against zombie waves
  
  

How it works

• Travel to a POI
  
  

• Tier 1–2 includes fetch phase before defense
  
  

• Build defenses with provided blocks (optional)
  
  

• Survive timed waves and meet kill requirements
  
  

• Return to trader
  
  

Tiers and availability

• Tier 1–6 exist
  
  

• Tier 5–6 defense is not offered by Trader Rekt (Pine Forest)
  
  

Rewards (typical)

• XP
  
  

• Casino Coins
  
  

• Defense blocks (sellable)
  
  

• Fortified Defenses magazines
  
  

• Fortress reward quest (after challenges complete)
  
  

Repeatability

• Tier 1–2: not repeatable
  
  

• Tier 3+: repeatable
  
  

Notes

• Leaving the mission bounds fails the quest
  
  

• Staying outside/within the designated area matters more than building indoors
  
  

SURVIVAL QUESTS (Endurance Test)
Objective

• Survive for a set time while under attack
  
  

How it works

• Travel to a rally point
  
  

• Survive 3–10 minutes depending on tier
  
  

• Stay within 20 meters of the rally point
  
  

• Vehicle use is not allowed during the survival phase
  
  

• Return to trader
  
  

Tiers

• Tier 1: 180 seconds (3 minutes)
  
  

• Higher tiers: longer duration and higher pressure
  
  

Rewards (typical)

• XP (approx. 4,000–8,000+)
  
  

• Casino Coins (approx. 700+)
  
  

• Loot rewards
  
  

• Surviving At All Cost magazines
  
  

• Surviver reward quest (after challenges complete)
  
  

Repeatability

• Tier 1: not repeatable
  
  

• Higher tiers: repeatable
  
  

Notes

• Objective is survival, not kill count (unless the tier specifically demands it)
  
  

4. VEHICLE RECOVERY QUESTS (Car Retrieval)
   Objective
   
   

• Locate and return a vehicle to the trader
  
  

How it works

• Travel to the POI zone
  
  

• Find buried treasure chest
  
  

• Vehicle spawns nearby once the chest is reached
  
  

• Drive the vehicle back while under pressure
  
  

Tiers

• Tier 1–6
  
  

Rewards (typical)

• XP
  
  

• High Casino Coin payout (strong money source)
  
  

• Grand Theft Auto magazines
  
  

• Car Thief reward quest (after challenges complete)
  
  

Repeatability

• Repeatable
  
  

Notes

• Exiting the dig area quickly helps the vehicle spawn in a cleaner spot
  
  

• Fuel and repairs improve completion consistency
  
  

MOBILE DEFENSE QUESTS (Intel Gathering)
Objective

• Use an antenna to locate buried intel while defending against attracted zombies
  
  

How it works

• Special antenna item guides toward buried intel
  
  

• Antenna noise draws enemies
  
  

• Dig up Small Intel and Large Intel
  
  

• Return to trader
  
  

Tiers

• Tier 3–6 only
  
  

Rewards (typical)

• XP
  
  

• Casino Coins
  
  

• Intel items (sellable)
  
  

• Buried treasure loot
  
  

• Defense on Wheels magazines
  
  

• The Intercept reward quest (after challenges complete)
  
  

Repeatability

• Repeatable
  
  

Notes

• Large Intel has higher value
  
  

• Challenge tracking includes kill totals during these missions
  
  

THE CULT QUESTS (Story and Ritual Line)
Objective

• Follow notes and complete ritual steps to progress a lore-driven quest line
  
  

How it works

• Notes are found in trash, backpacks, or via traders
  
  

• Notes unlock ritual quests
  
  

• Ritual crafting may require items like rotten flesh, candles, blood bags
  
  

• Ten notes total form the full story
  
  

Rewards (typical)

• XP (often 666 per ritual step)
  
  

• Story progression
  
  

• The Cult reward quest at the end
  
  

Repeatability

• Rituals are repeatable
  
  

Notes

• Designed as lore content alongside progression
  
  

7. NEST DEMOLITION QUESTS (Explosive Missions)
   Objective
   
   

• Destroy zombie nests using explosive-focused mechanics
  
  

Rewards (typical)

• The Art of Demolition magazines
  
  

• Explosive-oriented bonuses
  
  

Notes

• Less common compared to other quest types
  
  

CHALLENGE GROUPS AND META PROGRESSION

Challenge Groups track long-term completion goals. Completing a full set unlocks a reward quest and can open further progression.

Monster Slayer Challenge Group

• Requirement: eliminate all 10 normal boss types (Tier 1–5 Hunt)
  
  

• Reward: Monster Slayer quest
  
  

• Unlocks: God Slayer group access
  
  

God Slayer Challenge Group

• Requirement: eliminate infested bosses (Tier 6 Hunt)
  
  

• Unlocked only after Monster Slayer completion
  
  

• Rewards: God Slayer Path books (each grants 1 skill point)
  
  

• Milestones: 10 infested = 2 skill points, 50 infested = 5 skill points
  
  

Fortress Challenge Group

• Requirements: complete Defense quests across tiers, meet placement/volume targets, read Fortified Defenses set
  
  

• Reward: Fortress quest
  
  

Survivor Challenge Group

• Requirements: complete Survival quests across tiers, meet volume targets, read Surviving At All Cost set
  
  

• Includes: 3 Survival quests in one day milestone (skill point reward)
  
  

• Reward: Surviver quest
  
  

Car Thief Challenge Group

• Requirements: complete Vehicle Recovery across tiers and milestones, read Grand Theft Auto set
  
  

• Reward: Car Thief quest
  
  

The Intercept Challenge Group

• Requirements: complete Mobile Defense milestones, kill tracking during missions, read Defense on Wheels set
  
  

• Reward: The Intercept quest
  
  

The Cult Challenge Group

• Requirements: find all notes, complete ritual line
  
  

• Reward: This Is Only The Beginning quest
  
  

MAGAZINES AND PERMANENT BONUSES
Each quest type has its own magazine series. Reading volumes grants permanent bonuses and set-completion effects.

Fortified Defenses (Defense Quests)

• 7 volumes
  
  

• Reduced crafting costs for blocks, traps, and defense items
  
  

• Set completion provides the largest discount tier
  
  

Surviving At All Cost (Survival Quests)

• 7 volumes
  
  

• Movement speed and stamina improvements
  
  

• Dodge chance with cooldown
  
  

• Open-space resistance and fall safety bonuses
  
  

• Set completion improves speed and stamina regen
  
  

Grand Theft Auto (Vehicle Recovery Quests)

• 7 volumes
  
  

• Vehicle speed bonuses (extra during recovery missions)
  
  

• Reduced vehicle damage, fuel efficiency, mission coin boosts
  
  

• Set completion significantly increases coin rewards
  
  

Defense on Wheels (Mobile Defense Quests)

• 7 volumes
  
  

• Loot quantity boosts, vehicle bonuses (extra during mobile defense)
  
  

• Better Large Intel find chance
  
  

• Set completion improves dukes and buried chest loot
  
  

The Art of Demolition (Nest Demolition Quests)

• Explosive weapon and mission bonuses
  
  

• Handling and XP improvements related to explosives
  
  

GENERAL PROGRESSION NOTES

• Some quest tiers are not repeatable (varies by quest type)
  
  

• Tier 5–6 Defense is not offered by Trader Rekt
  
  

• Mobile Defense begins at Tier 3
  
  

• Infested hunt progression sits behind normal boss completion requirements
  
  

• The Cult is story-focused alongside rewards
  
  

QUICK REFERENCE
Hunt: Boss elimination, Boss Score, XP, Coins
Defense: Waves, blocks, magazines, Coins
Survival: Timer endurance, magazines, Coins
Vehicle Recovery: Highest Coins, vehicle magazine progression
Mobile Defense: Coins plus intel and buried loot
The Cult: Notes, rituals, lore progression
Nest Demolition: Explosive-focused rewards and bonuses

Best for money: Vehicle Recovery
Best for long-term power: Infested Hunt progression and magazine sets
Best for skill points: God Slayer milestones

ZOMBIE INC – THE CULT QUEST LINE GUIDE
Comprehensive Player Guide
Status: LIVE
 

WHAT IS THE CULT
The Cult is a story-driven quest line in Zombie Inc told through 10 mysterious notes and ritual quests. This is narrative horror content with unique mechanics, supernatural encounters, and boss fights.

Difficulty: Very Hard
Recommended: Mid to late game
Biome Requirement: Pine Forest (rituals must be performed here)

HOW TO START THE CULT QUEST LINE

Step 1: Find Mysterious Note #0 (The Priest Note)
The first note can spawn in two container groups:

Trash bags and junk containers (groupJunk01)

• 2% drop chance
  
  

• Trash piles, garbage cans, dumpsters
  
  

Backpacks (groupBackpacks01)

• 2% drop chance
  
  

• Lootable backpacks and zombie backpacks
  
  

Tips for finding Note #0

• Loot every trash bag and backpack found
  
  

• Clear POIs fully and check every container
  
  

• 2% drop rate means roughly 50 containers on average
  
  

• Persistence matters (this is intended to be rare)
  
  

Step 2: Read the note
Read “Mysterious Note #0” (ZombieINC_Quest_Priest) from inventory. This unlocks the ritual recipe and begins the quest line.

THE CULT PROGRESSION PATH
The Cult quest line is a linear 10-step progression tracked by challenges:

Challenge 1 (ZINCTC1): Craft the Ritual
Challenge 2 (ZINCTC2): Complete Priest Quest
Challenge 3 (ZINCTC3): Unlock Mother Quest
Challenge 4 (ZINCTC4): Complete Mother Quest
Challenge 5 (ZINCTC5): Unlock Penitence Quest
Challenge 6 (ZINCTC6): Complete Penitence Quest
Challenge 7 (ZINCTC7): Unlock Farmer Quest
Challenge 8 (ZINCTC8): Complete Farmer Quest
Challenge 9 (ZINCTC9): Unlock Father Quest
Challenge 10 (ZINCTC10): Complete Father Quest

Each step unlocks the next.

RITUAL MECHANICS

Crafting the Ritual Item
After reading Note #0, the Ritual crafting recipe becomes available.

Recipe: Ritual (ZombieINC_spawnRitual_1_TheCult)

• 100 Rotten Flesh (foodRottingFlesh)
  
  

• 50 Wood (resourceWood)
  
  

• 25 Bone (resourceBone)
  
  

• 3 Candle (candle)
  
  

• 1 Blood Bag (medicalBloodBag)
  
  

Craft time: 10 seconds
Important: Ritual only works in Pine Forest biome

Performing a Ritual

• Craft the ritual item
  
  

• The ritual quest (ZINCRitual) auto-activates
  
  

• Ritual NPCs and boss quests become available
  
  

• Reward: 666 XP
  
  

THE 5 RITUAL BOSS QUESTS
Each boss stage includes an unlock quest (for later bosses) and the boss fight quest.

All ritual NPC locations spawn roughly 350–600m away in Pine Forest.

General boss phase loop

• Travel to ritual NPC location
  
  

• Create rally point (buried marker appears)
  
  

• Stay within the radius during active phases
  
  

• Dig up buried chest
  
  

• Wait 3 seconds after opening
  
  

• Kill the boss
  
  

• Return to ritual NPC and interact
  
  

QUEST 1: THE PRIEST
Mysterious Note: #1 “Just An Innocent Girl”
Boss Quest: ZINCPriest

Boss: The Priest (BossPriest)
Buried chest contains: Suspicious Tea (Red Tea – Priest variant)

Rewards

• 666 XP
  
  

• Ritual’s Helmet (ZombieINC_armorRaiderHelmet)
  
  

• Unlocks trader interaction quest (ZINCTCTRADER1)
  
  

• Mysterious Note #2 (from buried chest)
  
  

Quest warning note: “Don’t shoot in her head…”

QUEST 2: THE MOTHER
Mysterious Note: #3 “Once An Innocent Girl”
Unlock Quest: ZINCMotherInfestedUnlock “The Immaculate Woman”
Boss Quest: ZINCMotherInfested

Unlock requirements

• Kill 3 screamers (listed as “Fallen Priests”)
  
  

• Return to ritual NPC
  
  

• Reward: 6,060 XP
  
  

Boss: The Mother (BossMotherInfested)
Buried chest contains: Red Tea – Mother variant

Rewards

• 6,060 XP
  
  

• Ritual’s Candle (ZombieINC_candle)
  
  

• Unlocks trader interaction quest (ZINCTCTRADER2)
  
  

• Mysterious Note #4
  
  

QUEST 3: THE PENITENCE
Mysterious Note: #5 “The Blind Justice”
Unlock Quest: ZINCPenitenceInfestedUnlock “The One Who Punish The Deviants”
Boss Quest: ZINCPenitenceInfested

Unlock requirements

• Craft 50 wood spikes (trapSpikesWoodDmg0)
  
  

• Craft 50 iron spikes (trapSpikesIronDmg0)
  
  

• Return to ritual NPC
  
  

• Reward: 6,060 XP
  
  

Boss: The Penitence (BossPenitenceInfested)
Buried chest contains: Red Tea – Penitence variant

Rewards

• 6,060 XP
  
  

• Ritual’s Boots (ZombieINC_armorPreacherBoots)
  
  

• Unlocks trader interaction quest (ZINCTCTRADER3)
  
  

• Mysterious Note #6
  
  

QUEST 4: THE FARMER
Mysterious Note: #7 “The Butcher”
Unlock Quest: ZINCFarmerInfestedUnlock “The Hand That Feed Us All”
Boss Quest: ZINCFarmerInfested

Unlock requirements

• Kill 7 boars
  
  

• Kill 7 chickens
  
  

• Kill 7 bears
  
  

• Kill 7 wolves/dogs
  
  

• Return to ritual NPC
  
  

• Reward: 6,060 XP
  
  

Boss: The Farmer (BossFarmerInfested)
Buried chest contains: Red Tea – Farmer variant

Rewards

• 6,060 XP
  
  

• Ritual’s Gloves (ZombieINC_armorPreacherGloves)
  
  

• Unlocks trader interaction quest (ZINCTCTRADER4)
  
  

• Mysterious Note #8
  
  

QUEST 5: THE FATHER
Mysterious Note: #9 “The Fallen King”
Unlock Quest: ZINCFatherInfestedUnlock “The Father Of Us All”
Boss Quest: ZINCFatherInfested

Unlock requirements

• Kill 1 The Mother (BossMotherInfested)
  
  

• Kill 1 The Penitence (BossPenitenceInfested)
  
  

• Kill 1 The Farmer (BossFarmerInfested)
  
  

• Return to ritual NPC
  
  

• Reward: 6,060 XP
  
  

Boss: The Father (BossFatherInfested)
Buried chest contains: Revelation’s Tea – Father variant

Rewards

• 6,060 XP
  
  

• Ritual’s Outfit (ZombieINC_armorPreacherOutfit)
  
  

• Mysterious Note #10
  
  

• Completes the main Cult storyline
  
  

TRADER INTERACTION QUESTS (SPREAD THE WORD)
After each boss stage, a trader interaction quest becomes available:

ZINCTCTRADER1 (after Priest)
ZINCTCTRADER2 (after Mother)
ZINCTCTRADER3 (after Penitence)
ZINCTCTRADER4 (after Farmer)

Objective

• Travel to nearest trader
  
  

• Interact to “share the news”
  Reward: 666 XP each
  
  

Story responses (traders do not believe the player):

• Trader 1: Radiation and “going crazy” implication
  
  

• Trader 2: Mentions collapse in the woods
  
  

• Trader 3: Claims the author was a madman who vanished
  
  

• Trader 4: Warns to stop using “substances”
  
  

FINAL REWARD QUEST

Quest: ZINCBoneKnife “This Is Only The Beginning”
Subtitle: Signature Weapon Mission – Bone Knife
Requirement: Complete all 10 Cult challenges

Flow

• Travel to NPC location
  
  

• Create rally point
  
  

• Dig buried chest
  
  

• Wait 3 seconds
  
  

• Kill Lower Priest mini-boss (MiniBossBoneKnife)
  
  

• Kill cultists while holding the Cursed Bone Knife through quest stages
  
  

• Complete objectives
  
  

Rewards

• 5,000 XP
  
  

• Cursed Bone Knife (ZombieINC_meleeWpnBladeT0BoneKnife)
  
  

Weapon Stats

• Type: Knife (Piercing)
  
  

• Base damage: 16 (perk affected)
  
  

• Attacks per minute: 120
  
  

• Durability: 250
  
  

• Mod slots: 0
  
  

RITUAL ARMOR SET – PREACHER’S ARMOR

Helmet: Ritual’s Helmet (Priest reward)

• Heavy armor
  
  

• Bartering bonus scaling (tier 1–6)
  
  

• Stun resistance scaling (tier 1–6)
  
  

Outfit: Ritual’s Outfit (Father reward)

• Heavy armor
  
  

• Damage resistance vs zombies scaling (tier 1–6)
  
  

Gloves: Ritual’s Gloves (Farmer reward)

• Heavy armor
  
  

• Damage vs zombies scaling (tier 1–6)
  
  

Boots: Ritual’s Boots (Penitence reward)

• Heavy armor
  
  

• Trap and mine trigger delay scaling (tier 1–6)
  
  

• Reduced trap incoming damage scaling (tier 1–6)
  
  

Full Set Bonus (all 4 pieces equipped)

• Reduced critical injury chance
  
  

• Reduced infection chance
  
  

• Reduced trap incoming damage
  
  

• “A sinister aura surrounds you now…”
  
  

Armor Type Notes (Heavy Armor)

• High resistance and temperature coverage
  
  

• Penalties include reduced mobility, higher stamina drain, increased noise
  
  

REWARDS SUMMARY

Total XP (full Cult line)

• Grand Total: 57,936 XP
  
  

Unique items

• Full Ritual Armor Set (4 pieces)
  
  

• Cursed Bone Knife
  
  

• Ritual’s Candle
  
  

• 10 Mysterious Notes
  
  

TIPS AND COMMON MISTAKES

Finding Note #0 faster

• Focus on POIs with lots of trash and containers
  
  

• Loot backpacks consistently (including zombie backpacks)
  
  

• Expect long hunts due to 2% drop rate
  
  

Prepare ritual materials in advance

• Rotten flesh, wood, bone are easy to stack
  
  

• Candles and blood bags are the common slowdown items
  
  

Combat preparation

• Bosses are Very Hard
  
  

• Bring healing and stamina supplies
  
  

• Stay inside the quest radius during boss phases or the quest can fail
  
  

Biome requirement (most common fail point)

• Rituals only work in Pine Forest
  
  

• Biome can be checked using F3
  
  

REPEATABILITY

Repeatable

• ZINCRitual
  
  

• All 5 boss quests
  
  

• Trader interaction quests
  
  

Not repeatable

• The 10-challenge story progression (one-time chain completion)
  
  

• Final Bone Knife reward quest (one-time)
  
  

CULT STORY SUMMARY (SHORT)
The notes tell the story of an investigator uncovering a cult and descending into madness. Ritual teas, supernatural encounters, and escalating bosses reveal the cult’s hierarchy and the final warning: this is not the end.

FAQ

Q: Where does Mysterious Note #0 drop?
Trash bags/junk containers and backpacks. 2% drop rate.

Q: Why will the ritual not activate?
Not in Pine Forest biome.

Q: Can this be done co-op?
Yes, most phases can be shared, but unlock/trader steps may vary.

Q: What happens if leaving the radius during boss phases?
Quest failure risk. Stay inside the circle.

Q: Can multiple Bone Knives be earned?
No, the final reward is one-time.