Sometimes, the best games are enjoyed with friends. There are tons of games that have been developed with co-op gameplay in mind, including shooters and adventure titles, that all set a common goal. The PS4 has a huge library of cooperative games you can play either with your buddies on the couch or with folks from all over the world thanks to massive multiplayer experiences.
Co-op games can be anything like PlayerUnknown's Battlegrounds, which features cooperative play right up until the very end, or huge campaigns you can take on with your friends in games like Call of Duty: Black Ops III. You can team up to take on other teams in a huge deathmatch or give the campaign a try with your friend. Whatever your interests in co-op gameplay, there's a game for you... and a friend!
Newer games like Crackdown 3 offer options for solo play, but why take on the bad guys by yourself when you can just as easily join forces with someone you know to take down an entire evil empire? Other games like Rocket League let you play soccer, but with a twist! Hop into your own race car and knock a giant ball about a humongous field with your pals (or against them) in this hugely popular game!
If there is a co-op PS4 game that's not here, go ahead and add it below, and don't forget to vote up your favorites!