Project Cars has been delayed for a third time.

Slightly Mad Studios' racer is now due out for Xbox One, PlayStation 4, and PC in mid-May, according to Bandai Namco.

The Wii U version was not mentioned.

"The shift of the release date is due to the team's continued dedication to polishing the game," Bandai Namco said in a statement.

Project Cars was first delayed from November 2014 to March this year, then that release was pushed to April 2.

Slightly Mad Studios has promised to compensate those waiting with free content the day the game comes out.

“Despite our long heritage and pedigree in making critically-acclaimed racing games, Project Cars is by far the grandest and most intricately detailed of them all,” said Slightly Mad Studios head Ian Bell.

“Despite therefore the game being 99.9 percent complete, the remaining 0.1 percent attending to small issues and bugs has been tricky to anticipate. We're absolutely dedicated to delivering a ground-breaking experience and by targeting mid-May fans can be assured that's what they'll receive.

“Again, we want to thank our fans for their support and patience on this matter. There's a high expectancy from racing fans around the world that Project Cars is going to be an exciting new contender in the simulation racing space and we firmly believe gamers deserve it to be in its most complete and polished state when they come to play it on day one.

“And since the gaming community is our primary focus and has always been at the heart of the project during development, we would like to offer some free content to all players as compensation for this short delay and as acknowledgement of how grateful we are. This gift, that we're sure is going to excite fans, will be available from day one and revealed shortly."