Cuman Flush Achievement
Win the second Kotyan mission without advancing to the Castle Age.Quite easy: at the start, retreat straight to the objective, and from there build a couple of town centres and build your economy being careful not to advance in age. You can take you starting troops south to start harassing the yellows and can even take out there closest town centre if you take out the villagers first to give yourself the advantage. This should put them on the back foot. Once you have a reasonable economy train some troops such as spearman and scout cavalry, in addition you can also train battering rams in the feudal age to help with the castles. Only focus on yellows, ignore the oranges to the east entirely.