Beat the Odds achievement

Description
Whew...Egil made it the whole way!

How to get it

 * In Chapter 2 immediately after the first battle of Skogr as Rook, shoot at the Dredge threatening Alette.
 * In Einartoft in Chapter 5, on second day defend the bridge in battle.
 * Do not recruit Onef.
 * Better do not lose battles at all, after defeat in some of them, Egil may die.