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For original mode, see Zombie Shelter.

Zombie Shelter: Coop is a PvE (Player vs Environment) mode in Counter-Strike Online.

Overview

Zombie Shelter: Coop is the co-op version as well as the updated version of the original Zombie Shelter mode. Unlike the original, there is only one shelter for the players to defend from zombie and boss attacks. This new update also includes more upgrades and power ups, bringing a variety of results into play. Note that the players must defeat the bosses or success to request for rescue in order to win the game.

Resources such as wood, steel and food will each now have a storage area. The players must deliver those resources to the storage in order to upgrade the shelter.

Structures and Buildings

Name Description Note
Worktable icon
Worktable
This is the site for crafting. To build this worktable, it requires Beginner Engineer Skill. Unlocks:
  • Shelter Tier 2.
  • Combat:
    • Craft Machete: Deals higher damage and can collect 2 resources in 1 hit.
    • Enhance Gun Barrel: Enhances primary weapon to deal higher damage.
    • Craft Pistol: Crafts a USP45. Disappears after death, needs to craft again.
  • Survival:
    • Craft Crowbar: Higher attack rate and can collect 4 resources in 1 hit.
    • Enhance Fuse: Mines can be detonated two times.
    • Induction Sensors Build: Can control the setting for mines.
  • Engineer:
    • Craft Claw Hammer: Higher attack rate, faster repair and build time.
    • Enhance Turret: Turret enhanced deals more damage, more durable.
    • Public Resource Distributing System: The engineer builds using public resources, instead of individual.
Zsht btn mainselter1@n
Shelter Tier 2
This is the upgraded shelter that can be upgraded after building a Worktable. Unlocks:
  • Reconnaissance Guard Post.
  • Enhanced Barbed-Wire Fence.
  • Thorn Trap.
  • Flamethrower.
  • Communication Tower.
  • Medium Generator.
  • Liquid Nitrogen Cylinder: Sets up a freeze trap. It will explode when the enemies come nearby. The enemies around the explode range will freeze for a while.
Communication tower icon
Communication Tower
This is the tower that generates radar for players and indicates the location of black market for buying weapons. It requires Intermediate Engineer Skill to build this tower. After building this tower, the player is able to upgrade the shelter to Tier 3.
Zsht btn mainselter2@n
Shelter Tier 3
This is the upgraded shelter that can be upgraded after building a Communication Tower. Unlocks:
  • Claymore.
  • Gatling Tower.
  • Large Generator.
Concrete refinery icon
Concrete Refinery
This is the final structure needed to unlock special buildings. It requires Expert Engineer Skill to build this refinery. Unlocks:
  • Shelter Tier 4.
  • Battle Guard Post.
  • Concrete Wall.
  • Enhanced Gate.
  • Mortar Setup: Setting it up will make it able to ignore obstacles and carry out attacks as turret. Launch speed and number of times are strengthened.
Zsht btn mainselter4@n
Shelter Tier 4
This is the final upgrade for shelter after the player has built Concrete Refinery. Unlocks:
  • Shop Post: Can buy weapons at the watchtower.
  • Plasma Turret: Shoots lasers that are harmful to the zombies.
  • Electrics Tower: Attacks and stuns the enemies around the tower with electricity.
  • Mega Generator: Generates a huge amount of electricity.

Zombie Shelter: Coop introduces a more different and realistic method of building things. Building Menu can be opened by pressing B key. After purchasing any given item, you will have to build it manually. This can be done by clicking LMB (Default) to any selected area. You may destroy or cancel something (except the shelter itself, which repairs it instead) with RMB (Default).

Name Description Note
Zsht btn watchtower@n
Watchtower
Shelter Tier 1: Observation Post.

Shelter Tier 2: Reconnaissance Guard Post.

Shelter Tier 3: Battle Guard Post.

Shelter Tier 4: Shop Post.

The following buildings will consume the public resource and can only be build in the selected location.
Zsht btn wall@n
Barricade
Shelter Tier 1: Barbed-Wire Fence.

Shelter Tier 2: Enhanced Barbed-Wire Fence.

Shelter Tier 3: Concrete Wall.

Zsht btn metaldoor@n
Gate
Shelter Tier 1: Barbed-Wire Gate.

Shelter Tier 3: Enhanced Gate.

The gate will consume the electricity.
Zsht btn siren n
Alarm
The alarm will inform you of the enemy’s approach. Shelter Tier 1 (this item was removed and already became available when start).
Zsht btn trap@n
Trap and Explosion
Shelter Tier 1: Installed Type Mine.

Shelter Tier 2: Thorn Trap.

Shelter Tier 3: Install Claymore, Liquid Nitrogen Cylinder.

Shelter Tier 4: Electronics Tower.

Zsht btn autoturret@n
Auto Defense Tower
Shelter Tier 1: Gun Tower.

Shelter Tier 2: Flame Tower.

Shelter Tier 3: Gatling Tower, Mortar Tower.

Shelter Tier 4: Plasma Tower, Electric Tower.

Zsht btn technics@n
Function Building
Worktable: Available to upgrade Shelter Tier 2.

Communication Tower: Available to upgrade Shelter Tier 3, and open mini-map.

Concrete Refinery: Available to build Shelter Tier 4, Tier 3 Barricade, Gate, and Watchtower.

The following buildings will consume the public resource.
Zsht btn warehouse@n
Storage
Storage allows you to store your public resources. The public resource will be indicated at the upper screen, and you need to build more storage if you want to increase its maximum capacity. Click E keyboard button from the following object to share your resource. Requirement: Shelter Tier 1.
Zsht btn generator@n
Generator
You need a Generator to create electricity. Shelter Tier 1: Small Generator.

Shelter Tier 2: Medium Generator.

Shelter Tier 3: Large Generator.

Shelter Tier 4: Mega Generator.

Zsht btn healing@n
Recovery Facility
This is the facility for you to recover your HP or mental gauge. HP recovery: Emergency medical facility.

Mental gauge recovery: Camp Fire (Survival skill required).

Skills

  • Skill Tree Menu can be opened by pressing N key. There are 3 types of Skill set which can be chosen to upgrade: Combat, Survival and Engineer. However, it is recommended that each player should upgrade 1 Skill set only, due to their best performances.

Tier Upgrade Description
1 Zsh gunmaster1 icon
Beginner Gun Mastery
Level 1: You can use submachine guns and shotguns.

Level 2: Increases the damage of these types of weapons.

Level 3: Additional damage increases in these types of weapons.

  • The weapon price is reduced by 15%.
  • Maximum carrying amount of weapons has been increased.
Zsh ammoup1 icon
Ammo Up
Increases the ammo capacity by 50% of the max that you can have.
Zsh healthup1 icon
Health Up
Recovers health by:
  • Level 1: 5% increase.
  • Level 2: 10% increase.
  • Level 3: 15% increase. Rate of increase affected by number of days.
2 Zsh gunmaster2 icon
Intermediate Gun Mastery
Level 1: You can use assault rifles and sniper rifles.

Level 2: Increases the damage of these types of weapons.

Level 3: Additional damage increases in these types of weapons, the weapon price is reduced by 20%.

Zsh Combatcraft1 icon
Combat Crafting
Machete can be crafted at Workstation. Press E key at the Workstation, crafting menu appears.
Zsh armorup2 icon
Kevlar Enhancement
Increases Defense when you purchase Kevlar:
  • Level 1: 20%.
  • Level 2: 150%.
  • Level 3: 200%.
3 Zsh gunmaster3 icon
Advanced Gun Mastery
Level 1: You can use machine guns and equipments.

Level 2: Increase the damage of these types of weapons.

Level 3: Additional damage increases in these types of weapons, the weapon price is reduced by 25%.

Zsh healthup3 icon
Combat Master
When a certain amount of HP drops, you're invincible for a certain time.
  • Level 1: HP below 14%, invincible for 4 seconds.
  • Level 2: HP below 20%, invincible for 5 seconds.
Zsh gunmaster4 icon
Special Gun Mastery
Unlocks grenades on the buy menu.
  • Level 1: Grenade damage increased by 25%.
  • Level 2: Grenade available +1.
  • Level 3: Melee damage increased by 100% and the weapon price reduced by 30%.
4 Zsh airstrike icon
Bombing Request
Request an Air Bombing to the following area. Press 5 to use.
Zsht st btn t4statusup@n
Stats Up
Stamina, armor, weapon damage and amount of ammunition will be increased.

Tier Upgrade Description
1 Zsh lumberjack1 icon
Beginner Harvest
Increases the amount of wood and steel harvest:
  • Level 1: Harvest rate increases, the maximum carrying capacity also increases.
  • Level 2: Harvest rate increases, the maximum carrying capacity also increases.
  • Level 3: Collection volume increases, the maximum carrying capacity also increases.
Zsh speedup1 icon
Speed Up
Moving speed increases by 5% in Level 1, 10% in Level 2 and 20% in Level 3.
Zsh scavenger1 icon
Explorer
Level 1: Able to find the nearby Wood easily.

Level 2: Able to find the nearby Steel easily.

Level 3: Able to detect the nearby enemy.

2 Zsh blacksmith2 icon
Advance Harvest
Removal skill: Resources and money can be collected on some specific items within the map:
  • Level 1: Harvest rate increases, the maximum carrying capacity also increases.
  • Level 2: Collection volume increases, the maximum carrying capacity also increases.
  • Level 3: Harvest rate increases, the maximum carrying capacity also increases.
Zsh campfire2 icon
Campfire
Campfire is available in Recovery Facility section. Campfire can restore hunger and HP. Only one Campfire can be built at a time.
Zsh Survivalcraft1 icon
Survival Crafting
Crowbar available to craft at Workstation. Press the E key on the Workstation, crafting menu appears.
3 Zsh tracker3 icon
Hunter
Increases speed and damage of traps setting.
Zsh innerfocus3 icon
Endurance
Decreases the rate of decline in hunger by half. When hunger rate is more than 50%, HP recovers by 1% per sec.
Zsh locator2 icon
Scavenger
Have the chance to loot money, woods or steel from killing zombies.
4 Zsh stealth icon
Cloak
Becomes half-invisible for 15 seconds and while the buff is still active, your speed will be significantly increased as well as any damage delivered by thyself is fatal. The buff will be gone either after said amount of time or performed/received any sort of damage.
Zsht st btn t4shareresource@n
Resource Transporting
Resource from inventory is automatically transported to the storages if the inventory is full.

Tier Upgrade Description
1 Zsh medic1 icon
Auto Repair
Regenerates armor and automatic turret nearby. Auto repair takes effect only when idling.
  • Level 1: +1% repair per sec.
  • Level 2: +3% repair per sec.
  • Level 3: +5% repair per sec.
Zsh engineer1 icon
Beginner Engineer
Level 1: Able to build a Workroom.

Level 2: Tier 2 Construction Speed +15%.

Level 3: Tier 1 Building HP +10%.

Zsh architect1 icon
Improve Blueprint
Level 1: Decreases the number of required resource for construction.

Level 2: Additional Decrements on the number of required resource for construction.

Level 3: Additional Decrements on the number of required resource for construction.

2 Zsh Techcraft1 icon
Engineer Crafting
Claw Hammer can be crafted at Workstation. Press E key at the workstation, the craft menu appears.
Zsh engineer2 icon
Intermediate Engineer
Level 1: Able to build a Communication Tower.

Level 2: Tier 2 Construction Speed +15%.

Level 3: Tier 2 Building HP +10%.

Zsh electricup2 icon
Electrical Engineering
Decreases the number of required electricity for a new construction object.
3 Zsh recycle2 icon
Recycle
Allows users to collect resources from demolition of the building.
Zsh engineer3 icon
Expert Engineer
Level 1: Able to create Concrete Refinery.

Level 2: Tier 3 Construction Speed +15%.

Level 3: Tier 3 Building HP +10%.

Zsh hunter3 icon
Construction Master
Creation speed will increase when you have a certain amount of Mental Gauge.
4 Zsh c4expert icon
Wrecking team
Able to use C4 Bomb. C4 Bomb can deliver damage to any object.
Zsht st btn t4movetower@n
Turret Tower Moving
Able to move the built turrets to any place.

Tips

  • Do not engage any boss until your base is fully upgraded and that you have upgraded at least everything of one class.
  • The more wood and steel capacity you have, the more you can earn from just one slash.
  • None of the normal zombies will give you money except for certain conditions such as if you keep shooting until the noise meter is full, it will spawn some red skin colored zombies which gives $100 per kill.
  • C4 can be used to make short paths through the map, kill strong zombies such as Juggernaut and Deimos and your ownself so be careful.
  • Airstrikes can kill the user who has deployed it.
  • The "sentries" which the Angra Cocoon places can grant you money once you destroy them.
  • Each player should upgrade one class only so that building and survival is much easier.
  • The more medical treatments are built the more HP you will recover each second, as long as they are all together.
  • C4s can deplete one third of the bosses' health points.
  • The character's mental bar depletes slowly when wandering away from the shelter. Once it's drained, player will have a darkened vision, move slower and take damage every few seconds.
  • Combine the Stealth ability with strong weapons such as Triple Barreled Shotgun to perform massive damage.
  • Increase the tier of Shelter as soon as possible since the zombies attack is becoming more harder each wave.
  • Note that player will have one day of noon to pass through "sentries" as it was re-established once a night has passed and its HP increased by 100 each day.
  • Analyze the map carefully when the zombies attack at night, so players can make a suitable killzone from where the zombies mostly attack from.

Recommended weapons

Tknifeex2 Tbarrel Thanatos11 Skull3 Compound Bow Skull4 Balrog5 Janus-5

Compatible maps

Zsh deadcity pve cso Zsh dustcity pve cso Zsh hellride cso

Release date

  • South Korea: 14 November 2013.
  • Taiwan/Hong Kong: 19 November 2013.
  • China/Japan: 20 November 2013.
  • Singapore/Malaysia: 12 March 2014.
  • Indonesia: 23 April 2014.
  • Turkey: 14 May 2014.
  • CSN:Z: 23 September 2014.
  • Vietnam: 26 March 2015.

Hell Gate event

This is a special event that heavily modifies the following gamemode mechanics:

  • Only applied to the City of Damned (New) map.
  • Zombie amount on the map has been drastically increased.
  • Mid-level boss starts to appear from the day 3.
  • Wood & Iron in players inventory are slowly replenished.
  • Building cost, as well as the consumed energy are drastically reduced.

Gallery

Counter-Strike Online - Zombie Shelter(Co-op) in Dead City19:07

Counter-Strike Online - Zombie Shelter(Co-op) in Dead City

Trivia

  • The players have to build and repair the shelter manually in this mode.
  • This is the first game mode to introduce a movable buy zone; with the location depending on the amount of days that pass.
  • The mortar tower re-uses the firing sound from the AT4.

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