TZar Excalibur (2000)

Camelot's throne is in your hands. Leading powerful armies in epic battles, gather your knights of the Round Table in search of the Holy Grail, infiltrating spies disguised to rescue Queen Guinevere, survive the dangers of the enchanted castle of Morgana, melee against your own son, Mordred the traitor ... You will need the full power of Excalibur!