DOOM - missions 1-4

Starting out the year with an a time classic, angry man goes on rampage. I have no idea where any of the secret areas are so I'll most likely be skipping the ones that are not obvious. For those who want the story basically, after assaulting a senior officer for odering their men to fire on civilians, he is transfered to Mars only to find a demonic invasion already in progress.
Like, follow and stay hydrated.