From November 18th till 21st Overwatch will be free to play on a PS4 for PS4 plus members, Xbox one owners with Live Gold memberships and windows PC users with a battle.net account.
For the weekend overwatch will make 22 heroes and 13 maps available to play. it will also allow for a variety of modes like: Quick Play, Costum Games and the latest weekly Brawl.
The new players will be able to level up, earn loot boxes and unlock customazation options.
The biggest plus with this free weekend. Blizzard is offering all the progress you made in the weekend to be kept after you buy the game. ( Just be sure to use the same battle.net, xbox live or sony account.)
To get to know more about the release times, how to download and read over the frequently asked questions see this website: https://playoverwatc...s/blog/20372506