Co-op romp A Way Out has sold over nine million copies since its 2018 release. 

That's according to developer Hazelight Studios, which posted on Twitter to reveal the milestone in a series of posts designed to celebrate the company's tenth anniversary. In January 2021, the game had shifted 3.5 million copies, meaning a massive 5.5m units have been sold in the last three and a half years. 

"The development was a wild ride and the game was already a success back when it released. But even then, we never dared to dream of THIS many people playing our game," the studio wrote. 

"With that said, we will continue to look back at Hazelights first 10 years as we move on to show some... unexpected behind the scenes stuff for It Takes Two." 

Since A Way Out, Hazelight has released It Takes Two, which stands at over 16 million copies sold following a 2021 release.