Download size

How many GB is Occupy Mars: Prologue?

15 GB

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

Leave at least 23 GB free: games need headroom to unpack updates.

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

Occupy Mars: Prologue is an introduction to the world of Occupy Mars in which you have to use your brain in order to survive. The Prologue tells a separate story in a closed location and shows a sneak-peek of the full game mechanics.