Mercy is one of the most popular games on PlayStation 4, and it’s easy to see why. The game is a third-person action RPG with a strong focus on Mercy’s ability to heal people and defeat enemies. To play Mercy, you’ll need to create an account and install the game’s software. Once you’ve done that, open up the PlayStation 4 system menu and select “PlayStation 4.” Then, select “Mercy.” When Mercy appears on the screen, press “A” to start playing.