They Are Billions

They Are Billions is a real-time strategy game set in a distant future after a zombie apocalypse has left only a few thousand humans alive. You build and manage human colonies while billions of infected roam the world in swarms, threatening the last survivors.

Campaign

In The New Empire campaign, you follow the orders of Quintus Crane, ruler of the New Empire, and attempt to reconquer lands devastated by the infected. The campaign has 48 missions and more than 60 hours of gameplay. You build fortified colonies, use the Imperial Army to destroy infected swarms, develop your colonies through more than 90 technologies, and explore ancient human fortresses with your Hero. The campaign also reveals the story behind the apocalypse and how the pandemic began.

Survival mode

Each Survival Mode game generates a random world with its own events, weather, geography and infected population. You must build a successful colony and keep it alive against infected swarms for a set period of time.

Pause and plan

The game runs in real time, but you can pause at any point to make strategic and tactical decisions. While paused, you can place structures, issue orders to your army and review game information.

Build and defend

You build dwellings and provide food to attract colonists, who then live and work in the colony. Structures gather resources from the environment, and you can upgrade buildings to make them more efficient. Tesla Towers extend the colony’s energy distribution, while mills and power plants supply energy to buildings. Walls, gates, towers and other structures help guard the surroundings against the infected.

Train your army

You train and hire mercenaries to protect the colony. They require money and food, and each unit has its own skills and personality. These tormented fighters can also help destroy the infected.

The infected

Infected creatures roam the world, using their senses of smell and hearing to find targets. Each has its own AI: making noise attracts them, and killing some near an oil deposit can draw hundreds more to investigate. The game can display hordes of thousands of infected, with up to 20,000 units in real time, and swarms may pass directly through your colony’s path.

If even one infected breaks into a building, it infects the colony and workers inside. Infected workers then run off to spread the infection to other buildings, so outbreaks must be contained before they grow exponentially and become impossible to control.

Colony style

The buildings have their own animations, and the infected and other units use thousands of animation frames. The game’s visual style combines steampunk and Victorian influences.