I got a code for Gears of War 4 on PC when I bought an NVIDIA graphics card. You activate it though NVIDIA's website then they email you a code for the Windows Store. First person to PM me gets the code.
My fiance has just spent the last few days moaning about the installation of this game. It's 80GB which initially took forever but then it needed a mandatory update which, for some reason, meant the windows store had to reinstall the entire game and not just the update :/ he's only just managed to play it. Thankfully, he loves it!