I started off the game and finished the first two missions. I then attempted to finish the third mission, got blown up by the mines, and went back to a previous saved game. I then proceeded to buy a solar power plant and place it in red light, and try to make money. As i was playing i was seeing the awesome khaak everywhere, but they were busy with the argons. I left seta on overnight to let my frieghters make money for my station, woke up in the morning and my two frieghters were dead, I assumed killed by the khaak, the pirates had never bothered me and i had never bothered them.
Ok, so i'm getting pissed...lost my frieghters, khaak pissin me off, so I go back to a saved game RIGHT after I finished the second mission, buy a solar power plant, place it in red light just like before try to make money etc.etc.etc......I try leaving seta on overnight. Wake up in the morning my freighters are still alive !!!!! (and 2 mill credits in the station plus products and resources . and best of all NO KHAAK TO BE SEEN ANYWHERE!!!
Currently I am 7 days game time into the game, leaving seta on all the time to make money, and my empire is growing, and I STILL HAVEN'T SEEN ANY KHAAK SHIPS!!!!
This can mean only one thing.....either the appearance of the khaak is totally random (which i highly doubt now), and they can appear later than 7 days in game time. OR that the appearance of the khaak is triggered by trying the third mission.
So here is the summary, lol.
The only difference between the game where the khaak were everywhere and the game where the khaak still haven't shown up is that in the game where the khaak were everywhere I talked in argon one, then talked in goner temple, then entered the sector that gets attacked by khaak (sorry i'm at work and for some reason the name is slipping my mind).