Added by the AvP : Humans module are various structures that include lore, blueprints and valuable loot & blocks. These structures can be found across the world, some rarer than others.
Marine Camp Grass.

One of the most common structures added by the AvP : Humans module. Holds lots of food resources and some ammunition alongside having a dozen or so marines spawn with it.
Outpost Comm Bottom.

A rare structure added by the module with a balanced loot set similar to that of the Marine camp. Roughly two dozen or more marines can spawn with the structure.
Munitions Outpost.

A relatively rare structure added by the module. Designed internally similar to a factory it contains little loot in regards of food or materials but houses an incredibly large stockpile of ammo for guns. However, heavily guarded by marines.
Supply Outpost.

A much rarer structure added by the module. Holds an incredibly large amount of loot but is heavily guarded by marines.
Supply Outpost Variants.