Here's yet another opportunity to get hold of AC4 on Xbox One for just a fiver once again thanks to CDKeys. If you've yet to play it, Black Flag is perhaps one of the most enjoyable entries in the series once it gets going. Plus, you know, pirates. If that's not worth a fiver then I'm not sure what is. Don't forget - you can get a further 5% off if you punch in a Facebook discount code in at the checkout, bringing the price down to £4.27. Simply click here and enter your email address to get a new code. Thanks to jestercole1 @ HUKD!