The PlayStation 4 version of free-to-play shooter Blacklight: Retribution is getting a new mode and two new maps today as part of its first content update, developer Zombie Studios announced.

The first addition is the new co-op mode, Onslaught, which offers a "horde" style mode in which four players team up against never-ending waves of infected enemies. "Each wave and enemy type will force you to adapt as the threat changes. If you bank too heavily on fortifying one area, you might find yourself overrun. But if you remain too light and mobile, you may not have the heavy firepower you need to punch through what comes next. Rely on your wits and gear to see you through it. Those who find a way to succeed will be rewarded for their efforts!"

In addition to the new mode, two new maps will also feature in the patch: Metro and Decay. Metro is set in an abandoned subway station long since taken over by squatters and features a number of narrow corridors so watch your flanks and play smart. Decay is a slum fortress set deep in the worst and most rundown area of the city. Threats will come from above and below in this rat warren. Teams will need to stay sharp as they move together and watch the roof tops and ruined buildings.

In addition, the patch marks the debut of private servers in the PlayStation 4 version of Blacklight: Retribution. The dev team has also included a number of improvements to the game in the patch, such as performance optimizations and better matchmaking. The patch is already available to download, and you can check out more on the official post.