Originally developed under the title "Druid King," this real-time strategy game is set in ancient Gaul. Celtic Kings' "strategic mode" allows players to take command of one of four historically based factions: the Gauls, the Romans, the Teutons, or the Druids. The game also features a "story mode" campaign, which leads the single player through a series of missions in the role of a Gaul warrior named Larax, who has sworn to avenge the murder of his lover by the vicious Teutons. The story of Larax progresses through the Gauls' introduction to, alliance with, and eventual rebellion against Caesar's mighty Roman Empire.