PlayerUnknown’s Battlegrounds and Pro Evolution Soccer 2019 are currently free-to-play on Xbox One for a limited time, through until 12 November (AEDT), as a Free Play Days promotion.
Head to the Xbox Store and smack that “get” button to download and play both games for free. You don’t need an Xbox Live Gold subscription to download either game, but seeing how PUBG is an online game, actually, you do.
Alternatively, head to the desktop Xbox Store and add them to your account:
If your console isn’t setup for automatic downloads, you will find them under the Ready to Install menu, which was recently relocated to hide within your games menu: Head to Games and Apps > Games > right bumper to see Ready to Install.