https://www.polygon.com/2018/8/19/17756256/overwatch-free-weekend-ps4-xbox-one-pc

Overwatch will stage a four-day, free weekend beginning Thursday, Aug. 23. While free players will have to buy the game to continue beyond that, all 28 characters and every map will be available to them on all platforms — PlayStation 4, Windows PC and Xbox One.

Blizzard staged a free weekend a month ago, but that one was only for PC, observing the inaugural Overwatch League Grand Finals. The free play begins at 11 a.m. PT on Thursday, Aug. 23 and continues until Monday, Aug. 27 at 11:59 p.m. PT. After that, free players will be able to transfer any progress they’ve made if they buy Overwatch Legendary Edition on the console they played, or any version of Overwatch on PC.