There are 5 scenarios in the Gajah Mada campaign:
1. The Story of our Founders
2. Unconditional Loyalty
3. The Oath to Unify Nusantara
4. Serving the New King
5. The Pasunda Bubat Tragedy
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.