Unknown Threat

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Public Safety

Searching for Victims

Studying the Radiation

Hero of Megapolis

Unknown Threat

Unknown Threat

Objective(s)	Build and Upgrade: Civil Defense Base (fixed) Rehabilitation Center (fixed) Radiation Neutralizer (fixed) Relic Radiation Laboratory (fixed) Radiation Transcoder (fixed)
Reward(s)	Zombie Mansion (Stage 3) Abandoned Skyscraper (Stage 8)

Unknown Threat (also called An Unknown Threat in the Facebook version) is a Timed Quest in which the player has 192 hours to build and upgrade a total of 5 areas with assets leading up to zombie-related rewards. It was released as part of an update on 10.25.2013.^[1]^[2]

"Build a civil defense base! Celebrate Halloween and save Megapolis!"

"Halloween is coming, and strange people have started showing up on the streets of Megapolis! They don't respond to questions, their skin is cold and pale... some people think it's all part of a Carnival celebration, but others think it's a real zombie attack!

"The residents beg the mayor: find out what's happened!

"Megapolis's scientists have vowed to find a way to heal the victims and eliminate the threat! We need to start a rescue operation right away!"

Requirements

None

Tip	TIP Depending on how one plays the game, this quest may require approximately 260 total (for assets) and 409,500 (for building and foundation purchases) to complete fully.

Tip

TIP
Completion of most of these building constructions automatically provides the construction site for the next building for free. The sequence is as follows:

Civil Defense Base (Level 1) –> Civil Defense HQ (Level 2) and Rehabilitation Center
Civil Defense HQ (Level 2) –> Civil Defense Center (Level 3) and Radiation Neutralizer
Civil Defense Center (Level 3) –> Relic Radiation Laboratory –> Radiation Transcoder

Stage 1 - Public Safety[]

More and more people dressed like zombies are appearing as Halloween approaches. They're disturbing the peace!

Tasks:

Youur city should be ready for any eventuality, no matter how unexpected. Provide your residents with all the service programs they might require.

		Start building a Civil Defense Base (purchase Foundation) Costs: 100,000 or 3 , 12 and 6 Gives: 250 and 5,000 cap increase
		Build another Police Station Costs: 9,500 (10 min) or 2 , 10 and 3 Gives: 45 and 500 cap increase upon completion
		Build a Center of Nuclear Medicine Costs: 300,000 (24 hours) or 4 , 28 and 12 Gives: 750 and 12,500 cap increase upon completion

Rewards:

You did a great job and have earned a well-deserved reward. An experienced city leader like yourself can deal with any situation!

110
3,200
5 x Concrete Blocks

Stage 2 - Searching for Victims[]

They say the people dressed as zombies are acting strangely! They don't respond to questions, their skin is cold to the touch, and they've even been attacking people on the streets.

Tasks:

Start looking for victims right away. And make sure you identify the source of the threat!

		Finish building the Civil Defense Base (Level 1) Costs: 5 x Air Extractor 5 x Rebar 5 x Concrete Blocks (from Stage 1 above) Gives: and 10,000 cap increase upon completion, access to Civil Defense Base Contracts, and Rehabilitation Center Construction Site
		Accept the Searching for Victims contract at the Civil Defense Base (does not need to be completed) Requires: Civil Defense Base (Level 1) Costs: 6,100 and 4 hours Gives: 12,900 and 50 upon completion

Rewards:

Whether you want to celebrate Halloween or not is up to you, but no one is allowed to disturb the peace! You know this full well, which is why you're getting a reward: materials you need to continue construction.

130
4,400
10 x Photoelectric Doors

Stage 3 - Rescue Center[]

The city is faced with two important goals: figure out how to save the victims, and identify the source of the threat.

Tasks:

Collect some money and build a rehabilitation center. Then the people who look like zombies will stop walking around and scaring people!

File:Rehabilitation Center L1.png		Build a Rehabilitation Center Costs: 5 x Gas Filter 5 x Floor Slabs 5 x Bricks 5 x Powder Fire Extinguishers 10 x Photoelectric Doors (from Stage 2 above) Gives: 400 and 17,000 cap increase upon completion
		Collect taxes five times

Rewards:

The situation in the city has started returning to normal, and you've earned a reward: a zombie mansion! Build it in your city.

140
4,800
Zombie Mansion

Costs:

3x3 squares
20 and 15

Gives:

630 and every 6 hours
Can be sold for 32,000

Stage 4 - Rescue is Coming[]

Our scientists have found the cause of these people's strange behavior: it's relic radiation! We can start taking preventive measures right away.

Tasks:

You can reduce the number of relic radiation victims! Just upgrade the civil defense base and take preventive measures

		Upgrade the Civil Defense Base (convert to Civil Defense HQ, Level 2) Costs: 10 x Geotextiles 10 x Lawn Trellises 10 x Projector 10 x Photoelectric Doors Gives: 600 and 17,000 cap increase upon completion and access to Taking Preventive Measures at the Civil Defense Base
		Accept the Taking Preventive Measures contract at the Civil Defense Base Requires: Civil Defense HQ Costs: 6,200 and 6 hours Gives: 17,000 and 80 upon completion

Rewards:

You've figured out why these strange people have been appearing in Megapolis: it's relic radiation! You've earned a reward.

150
5,300
5 x Satellite Antenna

Stage 5 - Dangerous Radiation[]

According to scientists, relic radiation is made up of traces of the Big Bang that created our universe. It's dangerous to humans!

Tasks:

The first thing we need to do is build a neutralizer to protect most of the city.

		Build a Radiation Neutralizer Costs: 10 x Iron Beams 10 x Air Extractor 10 x Wave Absorbers 10 x Cement 5 x Satellite Antenna (from Stage 4 above) Gives: 350 and 20,000 cap increase upon completion and access to Neutralizing the Radiation at the Civil Defense Base
		Accept the Neutralizing the Radiation contract at the Civil Defense Base Requires: Radiation Neutralizer Costs: 7,500 and 6 hours Gives: 18,900 and 90 upon completion

Rewards:

You're doing a great job! You'll definitely save the city and its residents!

170
6,700

Stage 6 - New Life[]

Neutralizing the radiation helped enormously — we're no longer seeing new victims. Now we need to bring the city back to life!

Tasks:

Help make life in the city even safer by upgrading the civil defense HQ and housing new residents

		Upgrade the Civil Defense HQ (convert to Civil Defense Center, Level 3) Costs: 10 x Gas Masks 10 x Searchlight 10 x Steel Sheets 10 x Concrete Blocks Gives: and 23,000 cap increase upon completion
		House 1,500 residents

Rewards:

You've done great work and earned a reward! Would you like to tell your friends about it?

200
7,000

Stage 7 - Studying the Radiation[]

We need to learn more about relic radiation so we can make sure this never happens again!

Tasks:

Build a relic radiation laboratory. And warn your friends about how dangerous it is!

		Build a Relic Radiation Laboratory Costs: 5 x Ventilation System 10 x Floor Slabs 10 x Research Equipment 10 x Polyurethane 10 x Radar Antennas Gives: and 25,000 cap increase upon completion
		Visit 7 friends

Rewards:

Now you know how to save people from relic radiation once and for all! Complete your final task and start celebrating Halloween!

250
8,500

Stage 8 - Hero of Megapolis[]

Just a little more effort, and you can save Megapolis from relic radiation!

Tasks:

Build a relic radiation transcoder, complete the contract, and the city will be safe!

		Build the Radiation Transcoder Costs: 10 x Searchlight 10 x Radiolocation System 10 x Glass 10 x Piles Gives: and 12,000 cap increase upon completion and access to Cleaning Megapolis Streets at the Civil Defense Base
		Accept the Cleaning Megapolis Streets contract at the Civil Defense Base Requires: Radiation Transcoder Costs: 6,500 and 8 hours Gives: 22,500 and 110 upon completion