There is a Historical Setting Sale over at DTRPG. Some are settings and some are core rules with the setting baked in. As I type this, there are over 3 days left in the sale.
Mythras - the game formerly known as RuneQuest - Mythras is the new name for an older game, but while the name might have changed, the system remains the same, but presented in an updated format with new interior artwork and layout design, along with some new content (Special Effects, small tweaks to the rules, and Spirit Combat Effects). In fact, we've managed to pack more into a smaller space, and reduced the price accordingly. For those new to the game, Mythras is a percentile system. In Mythras your characters are defined by their culture, career, community, background, comrades, skills, magic and cults. Progression is through skill advancement – not levels or similarly abstract concepts. As your characters adventure and quest, their capabilities improve and their relationships deepen and strengthen. Players and Games Masters have complete flexibility over what can be achieved, and the way characters develop is entirely dependent on choices players make, depending on their characters’ aspirations and motivations.
Mythic Babylon - a setting for Mythras - Mythic Babylon is a role-playing supplement for the Mythras game system. It provides everything you need to take your Mythras game back to the 18th century BC and enter a world of cut-throat diplomacy, Machiavellian politics, and ecstatic prophets. Within these covers you'll find information on the society, culture, religion, trade, laws, and beliefs of Old Babylon and the surrounding lands. The setting is presented as a sand-box with a wide-ranging gazetteer of places to explore, each loaded with plot hooks. For those who like to play against the backdrop of history, we provide a timeline of past and near future events. A bestiary and a chapter for game masters rounds out the end of the book. This book contains everything you need to create adventures in the lands of Sumer, Akkad, and Subartu from the low lying Eden to the Cedar Mountains and even into the Underworld. Follow in the steps of kings like Gilgameš, Kubaba, or Hammurabi in this mythological and historical setting that was nearly 4000 years in the making.