Chieftains are one all the levels except floodgate, Cortana, and Halo.
Cortana =]
the level: Cortana on legendary
Cortana is an AI (Artificial Intelligence)
No, you free her at the second last level.
It is on the level "Cortana", to find out exactly where it is, go here: http://www.youtube.com/watch?v=XIE7I2OPgyA
yes in the 1st mission and cortana
yes
If by parasites you mean the spores on the levels floodgate,cortana and halo no they do not count as kills so sorry.
Well actually in Halo: Reach at the end you see that they moved him into a diffrent ship but never un-freeze him. and at the very end you see the ship him and cortana were in at the end of halo 3 crash landed on reach. Hey, actually at the very end of Reach they show Master Chief and Cortana but not were they were in halo 3. When you see him,hes is frozen at the time of Halo 1 not Halo reach. This can be very confusing, I know. Remember, Reach is a prequal to Halo 1.( Halo Reach happened before Halo 1 but not made before.) =P
Cortana is a character from the game Halo. The voice behind Cortana is Jen Taylor. Halo is based on a fictional artificially intelligent character. While the game is in play, Cortana provides the back story and tactical information following the Master Chief.
Yes, but she is not in the very beginning.