There are 6 scenarios in the Frederick Barbarossa campaign:
1. Holy Roman Emperor
2. Henry the Lion
3. Pope and Antipope
4. The Lombard League
5. Barbarossa’s March
6. The Emperor Sleeping
Win every scenario of the campaign using the cheat code “i r winner”. Then, to trigger the achievement, win any scenario of any campaign without using cheat codes. The quickest scenario is the 1st scenario of the William Wallace Learning Campaign: Marching and Fighting.