A PlayStation Plus subscription is essential if you want to play PS4 games online, but how do you convince your friends that it's worth the outlay? Sony has a simple idea: let people try it for free. It's running a Europe-only event that will make PS4 multiplayer free between November 15th and November 20th. So long as you have a game with an online multiplayer component, you can see what the fuss is about without signing up. If you've wanted to see how a Destiny 2 Crucible match works or have run out of local FIFA 18 foes, it won't cost you anything extra.
Source: PlayStation Blog