Sony's game-streaming service PlayStation Now officially launches for PlayStation Vita and PlayStation TV in North America today.

It was beta launched back in October so don't be confused if you think you already have it. Today marks the service's official launch, is all.

The service costs $19.99 a month (or $44.99 for three months) and allows you to stream over 100 PlayStation games on whatever console or device you're using it on.

However, there is also a 7-day free trial you can give a go to evaluate if the service is worth the money.

You can see all of the games available here. Five new ones were also added today: God of War III, Dynasty Warriors 8, MX vs. ATV Supercross, Bomberman Ultra, and The Last Guy.

PlayStation Now is also available on PlayStation 3 and PlayStation 4. When announced, it was said to also be coming to mobiles and tablets but that hasn't happened yet.

PlayStation Blog