They Are Billions

78KS77Metacritic
Released Jun 18, 2019by Numantian GamesVery Positive(85% of 51.2K Steam reviews)Recent: 81% positive

They Are Billions is a Steampunk strategy game set on a post-apocalyptic planet. Build and defend colonies to survive against the billions of the infected that seek to annihilate the few remaining living humans. Can humanity survive after the zombie apocalypse?

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Steam
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Gamivo
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Lowest price
-14% vs Steam£21.41
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Eneba
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K4G
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£190.19
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DLCs (1)

About They Are Billions

They Are Billions is a strategy game in a distant future about building and managing human colonies after a zombie apocalypse destroyed almost all of human kind. Now there are only a few thousand humans left alive that must struggle to survive under the threat of the infection. Billions of infected roam around the world in massive swarms seeking the last living human colonies.

Campaign: The New Empire - Available now!


Lead the campaign under the orders of Quintus Crane, ruler of the New Empire, and reconquer the lands devastated by the infected.

  • 48 missions with more than 60 hours of gameplay.
  • Build fortified colonies to survive in infected territories
  • Destroy the swarms of infected with the Imperial Army.
  • Make your colonies evolve with more than 90 available technologies.
  • Explore the ancient human fortresses with your Hero.
  • Discover the story behind the apocalypse... how did the pandemic start?

Survival Mode


In this mode, a random world is generated with its own events, weather, geography, and infected population. You must build a successful colony that must survive for a specific period of time against the swarms of infected. It is a fast and ultra addictive game mode. We plan to release a challenge of the week where all players must play the same random map. The best scores will be published in a leaderboard.

Real Time with Pause


This is a real-time strategy game, but don’t get too nervous. You can pause the action to take the best strategic and tactical decisions.
In Pause Mode, you can place structures to build, give orders to your army, or consult all of the game’s information.
This game is all about strategy, not player performance or the player’s skill to memorize and quickly execute dozens of key commands. Pause the game and take all the time you need!

Build your Colony


Build dwellings and acquire food for the colonists. They will come to live and work for the colony.
Collect resources from the environment using various building structures. Upgrade buildings to make them more efficient.
Expand the energy distribution of the colony by placing Tesla Towers and build mills and power plants to feed the energy to your buildings.
Build walls, gates, towers, and structures to watch the surroundings. Don’t let the infected take over the colony!

Build an Army


What kind of people would want to combat the infected?
Only the maddest ones. Train and contract mercenaries to protect the colony. They demand their money and food, and you will have to listen to their awful comments, but these tormented heroes will be your best weapon to destroy the infected.
Every unit is unique and has their own skills and personality – discover them!

Thousands of Units on Screen


Yes! They are billions! The world is full of infected creatures… they roam, smell, and listen. Every one of them has their own AI. Make noise and they will come – kill some of them to access an oil deposit and hundred of them will come to investigate.
We have created our custom engine to handle hordes of thousands of the infected, up to 20,000 units in real time.
Do you think your colony is safe? Wait for the swarms of thousands of infected that are roaming the world. Sometimes your colony is in their path!

Prevent the Infection


If just one of the infected breaks into a building, all the colonies and workers inside will become infected. The infected workers will then run rabid to infect more buildings. Infections must be eradicated from the beginning, otherwise, it will grow exponentially becoming impossible to contain.

Beautiful 4K Graphics!


Prepare to enjoy these ultra high definition graphics. Our artists have created tons of art pieces: Beautiful buildings with their own animations, thousands of frames of animation to get the smoothest movements and everything with a crazy Steampunk and Victorian style!

Game details

They Are Billions price history

Lowest tracked price: £14.05 (Jul 8, 2026) · current best: £21.41 across 4 stores.

They Are Billions player count & reviews

77% positive reviews in the last 30 days (85% all-time) · ~4 new reviews/day · 3.5K peak players in the last 30 days.

They Are Billions — frequently asked questions

Where can I buy They Are Billions at the cheapest price?

Right now the cheapest offer for They Are Billions is £21.41 at Gamivo. KingsPrice compares 6 offers from 4 stores — official stores and keyshops — and refreshes prices throughout the day.

What is the lowest price They Are Billions has ever been?

The lowest price KingsPrice has tracked for They Are Billions is £14.05 (recorded on Jul 8, 2026). This covers the stores and period we monitor — set a price alert to catch the next drop to that level.

How many people play They Are Billions?

They Are Billions peaked at 3.5K concurrent players on Steam in the last 30 days (highest on Jul 19, 2026). The player chart on this page updates daily.

Is it safe to buy a They Are Billions Steam key from a keyshop?

Keyshops are marketplaces that resell game keys, usually below official store prices. The keyshops listed on KingsPrice deliver genuine Steam keys, but buyer protection differs from official stores — check the shop's rating and refund policy before buying. You can hide keyshop offers at any time with the keyshops toggle. Keyshop prices vs Steam →

How can I get They Are Billions at a discount?

Create a free price alert on this page and KingsPrice will email you when They Are Billions drops below your chosen price. The biggest discounts usually appear during seasonal Steam sales and publisher promotions — the sale calendar on this page shows the next confirmed event.

System requirements

Minimum

Minimum:
  • OS *: Windows 7, 8, 10 (32 and 64 bits)
  • Processor: INTEL, AMD 2 cores CPU at 2Ghz
  • Memory: 4 GB RAM
  • Graphics: Intel HD3000, Radeon, Nvidia card with shader model 3, 1GB video ram.
  • DirectX: Version 9.0c
  • Storage: 4 GB available space
  • Additional Notes: Minimum resolution: 1360x768, recomended FULL HD 1920x1080.

Recommended

Recommended:
  • OS *: Windows 7, 8, 10 (64 bits)
  • Processor: INTEL. AMD 4 cores CPU at 3Ghz
  • Memory: 8 GB RAM
  • Graphics: Radeon 7950 or above, Nvidia GTX 670 or above. 4GB video ram.
  • DirectX: Version 9.0c
  • Storage: 4 GB available space
  • Additional Notes: 4K Monitor (3840x2160)

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