Crytek's upcoming Xbox One, PlayStation 4, and PC shooter Homefront: The Revolution pushes the CryEngine "to its limits," designer Fasahat Salim tells GameSpot.

"For us, we're really excited by the scale at which we're operating," Salim said. "We're pushing the CryEngine to its limits. This is one of the biggest worlds we've [ever] built at Crytek. So we're very excited about it."

The Revolution is a sequel to 2011's Homefront, which was brought to market by two companies that no longer exist, developer Kaos Studios and publisher THQ. Crytek paid $544,000 for the Homefront franchise during THQ's bankruptcy auction in 2013, and Dead Island publisher Deep Silver is now attached to publish The Revolution.

The original Homefront was set on the west coast of the United States, but The Revolution--which takes place four years into the Korean army's invasion of the country--is set across the nation in Philadelphia. Why choose the city of Brotherly Love?

"When we were thinking about this game, we could have based it anywhere," Salim said. "We wanted to go with Philadelphia because there's a lot of symbolic significance in Philadelphia. It's the birthplace of US independence. To this day, it has a lot of iconic buildings built around independence. It's home to the Liberty Bell, Independence Hall."

In The Revolution, the Korean army sets up their main camp in Philadelphia. This is a "significant statement of intent" on their part that shows a powershift toward Korea dominating the US, Salim says.

The future of The Revolution, however, has come into question as reports about Crytek's financial stability have come to light. Morale at Crytek UK, the division of Crytek making The Revolution, is reportedly "low," and it's believed that some staffers are not being paid on time. If all goes to plan, The Revolution will be available in 2015.