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PlayerUnknown's Battlegrounds and Pro Evolution Soccer 2019 are free for a limited time on the Microsoft Store according to each games listing. This is believed to be part of Microsoft's upcoming X018 event, which has gone live a bit earlier than intended.

At this moment in time its not clear whether this is a full-on giveaway or if each game is just free to play for a limited time. Either way if you have any interest in either game it might be worth claiming them sooner rather than later.

Links:

PlayerUnknown's Battlegrounds on the Microsoft Store

Pro Evolution Soccer 2019 on the Microsoft Store