Agave Viejo is likely named after the real-world succulent, the Agave, which can be seen throughout the arid areas of the game world. Blue Agave is used in the production of tequila.
In Undead Nightmare, care must be taken with the survivor leader, who is often located on a chicken coop and may be knocked off onto the ground, where he is much more vulnerable. If he dies, it will be impossible to save the town by assisting the survivors.
There aren't any NPC's around the Villa in Free Roam. They instead spawn around the tents. If the player assaults one of the Rebels or NPC's, the Mexican Army will track him around the area.
Should the player alert the Mexican Army here in Free Roam, the Rebels will pull out their weapons and run away into the cliffs.