I later found out that it won't open on its own as I need to also have the Multiplayer installed, so I started installing/downloading the Multiplayer as well. My gf gifted the game to me so I immediately started installing/downloading, starting from the Single Player.
I have yet to find a working fix or solution. I googled my problem as well, but to no avail. Hello everyone! I am having a LOT of trouble installing CoD WW2 as it refuses to run/open no matter what I do.