Awakening on a crashed train with only sparse memories of the past, and advanced combat tactics for fighting the enemies of Our Benefactors, step into the mind of a resistance fighter troubled by long lost memories as-well as mental and physical augmentation. The world we knew is gone, and all that remains is the oppressive Combine regime and the seemingly endless fight against them. Team up with the remaining resistance and explore locations both old and new in Outcast.
In Outcast, the wasteland has scattered areas of Xen Infestation of varying severity. Here's a moderately infested area found near a large body of water on what was once a lakeside pavilion in the mountains.
the more I look at Xen flora infesting Earth, the more I realize how much more fitting this scene is for the title Half-Life 2.