Gravity Rush 2 just came out in January last year, but Sony announced the servers will be closed this month, on January 19th . It seems that something has been changed, as it was announced that the online infrastructure will remain active until next summer. Players have been eager to chase down the last unlockables before the shutdown, but now it would seem there's less pressure.
The new date for closure is July 28th, so if you picked up the game recently you still have time to enjoy the online component.