I might get a bit of derision from this but I decided against my better judgement to take a punt on COD Ghosts via the cheap offer on CD Keys over the weekend (£20 - not bad as COD games dont drop in price for a loooong time).
Word of warning: The download is 66gb! If you're on a slow connection or have download limits that is a frankly insane size for a game like that. Freaking Skyrim was only 6gb!
Yes I could have found that out for myself if I'd done a bit of research before buying it never occurred to me and given how small COD games used to be this one should have a big warning sign hanging from it pointing out that it was coded by a chimpanzee. I understand BF4 is in the region of 20 - 30gb range.