Car Jack Streets is creating a huge buzz among iPhone gamers this week following its release, but it seems not all of them want to pay for it.

Developer TAG Games has just Twittered this:

"SHOCKING! Looks like sales of Car Jack Streets are less than a THIRD of total users. That is a massive proportion of piracy."

It's not the first game to suffer in this way though: puzzler Whack 'em All famously had 75 per cent of its users on a cracked version, with developer James Bossert even emailing the hacker responsible to find out how they did it.

Hopefully TAG is making enough money from the two thirds of people who have paid for Car Jack Streets to not feel (too) hard done by.

But the news is a sign that iPhone piracy remains a big challenge for the industry.

Want more? Check out our 12 other Car Jack Streets (iPhone) news stories!