Artifacts of the Ancients (2002)

From Introduction:

Every scav, raider, and trader knows that the scarred lands of the Twisted Earth, though seemingly desolate and broken to the untrained eye, are anything but “empty”. Though a wild, unchecked wind howls mercilessly by day and night in some regions, and the sun is unfettered in torturing the earth with its searing blaze, hidden among the sands, lost hills, and naked
mountains are jewels of a sort. Even the dark smudges of fused glass and molten metal once known as cities, which often sprout like unexpected flowers in the sand, bear treasures worth searching for.

Artifacts of the Ancients is a sourcebook for the post-apocalyptic d20 role-playing game DARWIN’S WORLD. Within these pages you will find a collection of useful, bizarre, and advanced technologies once utilized by the Ancients. Now, these relics are used once again by their most primitive ancestors. Treasure of a sort, these include lethal weapons, super-advanced personal armor, humming electronic devices, powerful and
“magical” medicines, and other objects worthy of worship and wonder.