Download size

How many GB is Cepheus Protocol?

8 GB

Leave at least 15 GB free: games need headroom to unpack updates.

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

Find patient zero before an alien virus takes over San Francisco and the cepheus protocol is enacted. Command your squad, save civilians, and stop the Pangu virus. Kill patient zero and save the world.