OpenRA Resource Center

Description:

Two players, versus a third, hostile faction in the middle, bearing combined arms for a safe spot on the top of the hill.
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All paths are possible, easiest being the naval/air one, as the sides are relatively safe (unless the enemy player chooses the same path.

The Hostile Forces guard several Oil Derricks, and a Forward Command in the very middle. It is heavily defended, though.
Enemies are seemingly agressive, the smallest opening, and a little provocation might cause some of the units to migrate towards your starting location and wreak havoc, it seems.
They also have gems guarded by Turrets, so make sure to take care of them first, before sending collectors.