FSR0712
From their Facebook page: Happy Sunday. Have a free issue of PC Gamer on iOS today – just use the code FSR0712 in the PC Gamer UK (https://itunes.apple.com/gb/app/pc-gamer-uk-worlds-number/id…) or PC Gamer US (https://itunes.apple.com/us/app/pc-gamer-us-worlds-number/id…) apps.
That's in the UK version.