Full 'Killzone: Shadow Fall' Box Art Revealed

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Bristow9091 said:

DialgaMarine said:
Anybody else a little bit iffy on the fact the disc version requires 45 GB of HDD space?

You do know it's not a mandatory install, right?

It is?, is not very clear in the box, it looks like you need that amount of free space, because the install is mandatory. How can I know/tell if the installation is mandatory or not?