Download size

How many GB is Atoll?

3 GB

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

Leave at least 9 GB free: games need headroom to unpack updates.

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

The earth has been struck by an extinction level meteor, eliminating most of humanity. Survive by managing resources beneath the ocean surface in a single-person submarine craft. Test your survival skills to see if you can once again reach the ocean surface and uncover the fate of the earth!