Download size

How many GB is UFO Enemy Known?

0.68 GB

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

Leave at least 6 GB free: games need headroom to unpack updates.

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

Help aliens invade Earth in this procedurally-generated, infinite, 3D shooter game. Fully destructible cityscapes and a wide variety of destruction-wreaking weapons. Visit (rampage and destroy) cities of future Earth and Mars block by block. Chaotic battle scenes as rubble and vehicles pile up.