The following is an illustrated walkthrough of each map from Unreal, penned by UnrealSP.org founder Hellscrag. It covers in detail the best route to take to visit most of each map, including most of the secret areas which you may or may not have discovered. The walkthrough was created playing Medium skill. Bear in mind also that Unreal's placement of things varies from play to play - this is catered for where possible.
Guiding you through the hostile planet