Rocket League developer Psyonix says cross-platform play could happen if only Sony would co-operate.

Vice president Jeremy Dunham told IGN that the developers had solved the technical issues surrounding play between PlayStation 4 and Xbox One.

“We’re literally at the point where all we need is the go-ahead on the Sony side and we can, in less than a business day, turn it on and have it up and working no problem,” said Dunham.

“It’d literally take a few hours to propagate throughout the whole world, so really we’re just waiting on the permission to do so.”

When asked when he thought Sony would come around on the issue, Dunham said, "It could be tomorrow, it could be longer than that. We just don't know."

“Sony's such a big company that I'm sure it takes a while for them to figure out what it is that the roadblocks are.”

Cross-platform play between Xbox One and PC was activated in May.

Rocket League, which still boasts 1.1 million active players a year after launch, is available now on new-gen consoles and PC.