Only with the right combinations of turrets and upgrades can we stem the tide of invaders! Be warned Ranger, the enemy will not take this lying down! They will send their commanders after you, each with their own unique abilities.

Collect the dimensional energy from your slain opponents to upgrade and gain new equipment on site. For this mission, we are equipping you with turrets to set up a defensive perimeter. For the first time with some certainty, it is now possible to say that on the evidence of the ERTS-1 imagery, the Western Rift does not continue northeast beyond the Sudan-Uganda border, and is thus not to be sought in western Ethiopia.Ranger, the Master Brain is besieging our dimension! We are expecting endless hordes of monsters and we are sending you in to prevent the assault. Further south, ERTS-1 imagery amplifies the structural and lithological mapping of the Precambrian rocks of the Shakisso-Arero area, and of the Kenya-Ethiopia border region. On the Somalian plateau, east of the rift, a denuded caldera has been identified as the source of much of the lavas of the Batu Mountains. The lithological boundaries mapped by De Paola in the rift are difficult to discern on the ERTS-1 imagery. The Corbetti caldera, shows up surprisingly poor on the imagery, and is shown to be an adjunct to an older, larger caldera now occupied by Lakes Awassa and Shallo. Characteristically, the ERTS-1 imagery shows some of the major faults to be more extensive than realized from ground studies, though due to the angle of sun illumination some east-facing fault scarps are not easily discernible on the imagery.

The new fault map of the main Ethiopian rift, based on aerial photo compilations, generally agrees well with the maps produced from ERTS-1 imagery. Mapping of the major structures of the African rift system The author has identified the following significant results.

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