Roma Imperious RPG: Alternate World History
An alternate history where during the third century Constantine embraced Celtic magic and took over the Roman Empire. It details the world of 1461 in this alternate history¸ including pre-Viking era Norsemen¸ a Chinese empire called the Jade Empire¸ and African states like Axum and the Empire of Ghana. It uses a variant of the ""Iridium"" system¸ which originally appeared in Tales of Gaea. Character creation includes random-roll attributes (best of 3d20 for each of eleven attributes)¸ followed by choosing one of 26 classes which influence skills. The basic game also includes over 30 Foes and 13 pregenerated templates for fast play. - A description from https://darkshire.net/jhkim/rpg/encyclopedia/ with kind permission of John H. Kim"
What if magic were real? During the third century Constantine had a dream of his soldiers with a Celtic symbol on their shields instead of the chi-rho. A druid came forward before the battle and the showed him a way to triumph over Maxentius with the help of the druids of the north. Constantine embraces magic and goes on not only to defeat all opposition¸ but to pacify much of the Empire's people beyond the Italian Peninsula. Schools are founded to teach and explore magic. Internal cults¸ like the Mithras¸ plot to gain control of the Senate and the Emperor in order to make their bid for power and dominate the Empire. Rebel celts and germans move against the settlements in the north while Persians do likewise in the east. All manner of Manes Atrox¸ a new monster like nothing seen yet¸ threatens from northern Skandia and from the depths of Africa. In Africa¸ slave colonies mine resources of all types while legions posted there fight the native tribes. In the northern prefecture of Scythia Magna the fortified colonies of legionary veterans attempt to hold the line against the Kingdom of Alkasas and their hordes of inhuman warriors¸ the Terragena.