Avoid it-- not even for custom campaign completionists.
Unfortunately there is not much good to say about this map. Zero sense of direction as the last reviewer stated, no rescue in sight (map never ends...Seeing a trend here with this author) and the mapping style used here is extremely inefficient, buggy and the complete OPPOSITE of optimized. Entire map is full of 'holes' so the mapper seems to have just enclosed the entire map in a box which is a very poor practice. Even if you're a custom content completionist I'd skip this series altogether, frankly. The only upside was the nifty textures but they are not utilized well enough here and often repeat to the point of becoming redundant again anyhow.
A unique approach to gameplay