Celtic Legends (1992)

From the back of the book:

Role-Playing Games have evolved! Celtic Legends bring new life to Heroic Fantasy, since the action takes place in the legendary past of Ireland, Great Britain and Gaul, rather than in a totally artificial world. The players set off on adventures in a world where the marvelous is a part of daily life: magicians accomplish prodigious feats and the bravest of men show themselves to be the equals of the gods.

Players freely choose the character they wish to embody, whether knights, warrior-magicians, druids, bards or spies... There are numerous possibilities, and each character is unique.
Though warriors' exploits are important to this game, combat is hardly the only way of proving oneself. The rules allow the players to compete in skill and cunning, participate in poetic jousts, or subjugate an audience through their prestige and eloquence... in short, to act in every way like the heroes of legends.

"Now Nuada knew his past, his present, and his future. He raised his large shield slowly toward the sun and brandished his sword. The morning light danced along the magic blade. The second battle of Mag Tured was about to begin..."