So I tried unpacking the game, and it shows me that I do not have enough space. Fair enough, i've been installing stuff lately. But then I look and see that it needs 450 GB.  How? My PC only has 716gb of space, how does a 900mb zip file turn into this huge game that is bigger than doom eternal?

i am not complaining but i want to know if its actually this big before i clear my PC

I sure do hope it is just my PC having a brain (cpu?) fart and reading the file size wrong