Sony's PlayStation Now game-streaming platform is getting a major discount.

Starting on Tuesday, customers who sign up for PlayStation Now will pay $99.99 per year. It normally runs $20 per month ($240 per year) or $45 for three months ($180 per year).

Sony says the offer will be available for a limited time through the company's PlayStation Store in the U.S. and Canada. Current customers with monthly or three-month packages can pay $99.99 to extend their subscriptions by one year.

PlayStation Now lets PlayStation 4 gamers stream hundreds of PlayStation 3 games to Sony's latest console. It's essentially Sony's way of getting PlayStation 3 owners to buy its new hardware and play games from both of its consoles. However, it has been criticized by some for being too expensive.

Sony's price reduction may also be a reaction to Microsoft launching Xbox One backwards compatibility with Xbox 360 games. Sony has long eschewed backwards compatability between PS3 and PS4, in part because it can charge for PlayStation Now instead.

Sony did, however, confirm that PlayStation 2 emulation is coming to PlayStation 4. Details are scant, but it appears you won't simply put your PS2 disks in the PS4.

In addition to the price drop news, meanwhile, Sony said that nine new games from Warner Bros. Interactive Entertainment are coming to PlayStation Now on Tuesday, including the company's popular Batman: Arkham series of games.