Kaos Studios has confirmed the leak online of upcoming shooter Homefront and hit out at those responsible.
However, it is still unconfirmed whether the leaked version of the game is playable.
Reports emerged last week that PC and console versions of the game, which has taken Kaos three years to create, were in circulation.
However, the game code does not appear to have been cracked, meaning the files in question are unplayable.
Confirming the leak to Eurogamer this afternoon, Kaos creative director and general manager David Votypka expressed his bitter disappointment at the news.
"There have been some files that have been leaked," he said. "We're still waiting for exact confirmation but I don't think it's technically playable. But you can put it on your machine.
"Obviously we're pretty disappointed in the people that did it. Those people obviously have no idea what it takes to make these games, or at least have no respect for it, if they're leaking them out for free.
"The consumer world and capitalism is based on, the company will spend money on a product so consumers can buy it, so the company makes a profit and can make more and better products down the road. So when these guys get involved they're just hurting that, which hurts everybody."
Homefront, due out next week, is the latest in a string of recent high-profile videogames to suffer a leak. Crytek's Crysis 2 and People Can Fly's Bulletstorm were leaked ahead of release earlier this year.
While Votypka doesn't know how Homefront was leaked, he did offer possible explanations.
"There are different ways," he said. "With past games it's been an internal source that leaked something to somebody out in the public. Other times, somebody's got a hold of the code in other ways.
"Half-Life 2 was leaked before it was released. It was somebody hacking into their network and actually grabbing the code. They're pretty inventive."