Download size

How many GB is Mirror 2: Project X?

10 GB

That is more than the typical Puzzle game, which needs about 3 GB.

Leave at least 17 GB free: games need headroom to unpack updates.

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

You are an agent in the Federal Bureau of Research and Protection (FBRP). Your job is to protect mankind from various supernatural objects and events. As the player, you will enter a vast, complex, and diverse world that provides an entirely new experience. Know that every choice will affect the story's conclusion.