Servants of Gaius released in PDF:
http://www.rpgnow.com/product_info.php?products_id=99908

Servants of Gaius(from the book):
As Neptune’s armies threaten the empire, Gaius Caesar Augustus
Germanicus (“Caligula”) creates a secret order to root them out.

Servants of Gaius

$ 19.99 SRP
The Servants of Gaius come from all the ranks of the Empire, chosen by
the divine emperor himself. In their quest to save Rome they face dark
cults, backstabbing politicians and even the gods themselves.

Servants of Gaius is a game of intrigue and investigation. It comes
with a complete alternate history setting but is perfect for any Roman
campaign.

The book includes:
•A complete and flexible rules system
•An overview of Roman society and government during the early empire
•Stats for important historical characters
•Monsters and other supernatural threats
•Rules for gods and rituals
•A map of the Roman world in 38 AD