1. get to know the controls especially if your use to the computer version, I suggest practicing on skirmish before tackling the campaign
2. it is unnecessary to do the bonus objectives if your goal is only to get this achievement
3. this achievement can be done on easy
4. don't get frustrated, you will most likely fail a few times, so when you feel comfortable save, consider this like a self made checkpoint.
5. try different strategies when you fail at one, what might work in one situation won't work in another.
6. this is truly an achievement to tell people that you got, you've completed a game meant to play with a mouse and keyboard... With a joystick.