Download size

How many GB is Mars Horizon?

4 GB

That makes it bigger than 59% of Simulator games we have measured.

The median Simulator game needs 2 GB; the largest tenth start at 20 GB.

Leave at least 10 GB free: games need headroom to unpack updates.

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

In Mars Horizon the player is tasked with leading a major space agency from the dawn of the space age though to humanity's journey to Mars. Players run a government space agency from when the first rockets launched into the atmosphere, right through to the first crewed mission to Mars. Research new tech, expand your agency base, build rockets, send satellites into orbit, and launch a variety of missions. As the player, you’re in charge of every element of the journey into space.