From publisher blurb:
What if the first roleplaying game had been about skulking around in ancient ruins, underground tombs, and ancient graveyards in search of treasure, magic and secrets Man Was Not Meant To Know… but the heroes themselves were pulpy archaeologists, explorers and mercenaries from the 1930s instead of the wizards and warriors of fantasy? Raiders! is a roleplaying game about “adventurous archaeology.” It is compatible with the Original Edition, and other games often collectively called “OSR” (Old School Rules) such as Warriors of the Red Planet, Colonial Troopers, Freebooter & Guardians.
Raiders! is a Complete Roleplaying Game!
4 new classes: Mercenary, Scientist, Treasure Hunter, and Occultist
Hundreds of new, incredibly powerful magic items called Relics
Random Adventure Tables
Dozens of monsters & encounters, and much more