The First part of the is guide will explain the controls and combat basics. It will help if you are stuck The next part will be pretty spoiler heavy so if you haven't finished the game be careful. 

This guide will describe in a general aspect What to do and what not to do in Chapter 2. The Chapter is very straight forward but all roads are dangerous. 

Full video speedrun showing off where to get all the achievements with timecodes for each one. 

Guide of all achievements 

SPOILER ALERT! This video shows how to fight the bosses and enemies in the battle of Chapter 1.5 with the Dark Elf assassin Elias Get grenades and nuke them also pierce them with the cross bow and use abilities on 1 and 2 key https://www.youtube.com/watch?...