Publisher's blurb: Deep in the deserts of Mexico lays a mysterious lost city. Rumors about this hidden place and its pre-Exodus secrets have spurred the interest of travelers and fortune seekers across known wastelands. A trip to the Junkyard leads to a quest into old Mexico in search of lost treasure. But are you prepared for terrifying secrets that waits beneath the sands. Down in Old Mexico is a 2-round continuous Exodus OPS campaign adventure for 4 to 6 characters of 5th to 7th levels.