More than 3 million digital copies of DiRT 3 have been stolen. The keys, which allow the full game to be downloaded from Steam, were stolen from graphics card producer AMD’s website.

According to Kotaku, the promotional keys for Codemasters’ rally driving game were stockpiled with the intention of being given away with new AMD graphics cards.

In a statement, AMD has said, “This past weekend, activation keys associated with free Dirt 3 game vouchers shipping with select AMD products were compromised.

“These activation keys were hosted on a third party fulfillment agency website, www.AMD4u.com, and did not reside on AMD's website. Neither the AMD nor Codemasters servers were involved.

“We are working closely with Steam, Codemasters, and our fulfillment agency to address the situation. AMD will continue to honor all valid game vouchers, however the current situation may result in a short delay before the vouchers can be redeemed.”

Promotional Steam codes can be tracked by developers, meaning those using the keys can have their access blocked.