OutsiderXE, creator of numerous Warcraft III campaigns, has released his latest work - a Co-op Campaign titled Shadow of the Xel'Naga
."StarCraft II: Shadow of the Xel'Naga is a custom campaign for the award-winning Real-Time-Strategy game StarCraft II, created with the StarCraft II Editor. All 7 maps were released on November 27th, 2015. They are available on the StarCraft II Arcade, free for everyone."
Based on the like-named StarCraft novel written by Gabriel Mesta, the project features gameplay covering a variety of genres. It can be accessed through the Arcade directly within Starcraft 2, and does not require a retail version of the game to run, only the starter version.
More information can be accessed on OutsiderXE's portfolio site
, including screenshots and a complete video playthrough.