Developer Fatshark has announced today that the long-awaited Co-Op mode for their hack-and-slash post-apocalyptic title Krater is now available for free to anyone. The new mode was included today in a post detailing bug fixes, tweaks to loot and more importantly performance issue resolutions.

"We are very happy to bring co-op to the Krater universe. The download is free, and will also include a large number of updates to the single player content." says Martin Wahlund, CEO and Executive Producer, Fatshark. "While the main game admittedly was released to fair success, that hasn't changed our commitment to our fans and our universe".

Krater is a retro-flavored post-apocalyptic top down RPG where you control a squad of free-diggers through the perils of an open game world. It is not your generic action RPG clone - it is lush in its colors, hardcore and got a different vibe to it. The base pillars are crafting, exploration and consequence. Consequence brings not only the ability for the characters to level up and improve themselves, but also permanent injuries and death.

Fatshark has also released a new trailer for the Co-Op mode, which has an uncanny resemblance to StarCraft 2's intro cinematic, even down to the robotic armour assembly which you can check out below.