I know that the achievements are somehow easy to get but knowing this will help you. There is an achievement that called "Natural Health" and this is the hardest achievement to get and you should be very careful in the game!
1- Start the game in easy mode! ( it was obvious, wasn't it? :D)
2- Do not let your health bar gets too low. WHY??? - because if its gets too low you will encounter a bug that you won't be able to interact with enemies and if you do that and try to use the combat finishers,You Will DIE over & over!!!! Weird!!!! If you face one of the bosses like "Viambor", you have to use combat finisher to kill it and to do so you must interact with it, but if you do that you'll die and you must start from somewhere else! >>>>> Be very Careful about this bug!
3- When you reached "Gandarava " you'll see two rocks that you should go up and stand upon them! Do Not go on the RIGHT side! Why? -Because if you do that, the game will crash!!!!
********* Keep these in mind and you'll get that achievement in no time!