Sony has said it is investigating slow download speeds affecting , though there isn't necessarily a connection between the two.

After significant delays, the free version of Evolution Studios' PS4 exclusive racing sim was given a release date.

"We’ve spent a long time preparing for this launch after some difficult and unexpected set-backs," said Shuhei Yoshida, president of Sony's worldwide studios.

"To make absolutely certain that all players have the smoothest and most stable experience possible we are going to be duly cautious about how we release the game this time around."

PlayStation Plus members can download the game and play it offline. Sony has said it will roll out online access and will "steadily bring more and more players online while continuously ensuring that all game systems are running smoothly."