Download size

How many GB is Extinction Day?

2 GB

That is less than the typical Simulator game, which needs about 4 GB.

Leave at least 8 GB free: games need headroom to unpack updates.

The figure is the storage Steam lists as required for this game, not a measured download.

Extinction Day is a strategy simulation game in which players orchestrate the end of humanity using a variety of catastrophic events including disasters, diseases, and wars. Players combine different catastrophes to overwhelm human survival efforts and spread destruction across the globe.