Some notes for people who, like me, are interested in finding out exactly what is required to get ally achievements. Very minor Noveria spoilers below.<BR><BR>I just got the Sentinel achievement. I got it with 11 "Missions" completed (gray), and 46 assignments completed. This is noteworthy as Kaidan has literally never left my party, from the moment I stepped onto Eden Prime. For reference, if memory serves, Lateralis (I think it was) got his Asari achievement with 17 Missions and 47 assignments.<BR><BR>Now the interesting thing to note here is this: it has been speculated that the achievements take fractions or partial completion into account. My experience bears this out as I got the achievement in the middle of a conversation with no apparent affect. I was at the part of Noveria (2nd part of Peak 15, after the tram) where you first come up the elevator and speak with the military guy holding the fort. The achievement popped in while speaking with him. As far as I can tell, the only thing that changed in my Journal as a result of this was an update on the ongoing Noveria Mission of "find benezia". By speaking with him, it incremented a new step, completing (check mark) the "she went to peak 15" step, and adding a new step of "she went to the hot labs in peak 15".<BR><BR>So take that as you will. Based on that, one could consider counting up the completed check marks in the journal. Given this, it would appear you need slightly more then 11 missions and 46 assignments, considering the Noveria mission had about 4-5 check marks at this point, leaving it more like 11 and 4/6s of a mission or something like that.<BR><BR>Also of note: I have done pretty much every sidequest I have come across, but still have Liara's dig site and Virmire and Ilos to do. In terms of collection quests, I have one completed, and the element survey quest is half done. Given the amount of stuff I still have in my game, it seems safe to say that while it may be iffy to try and do this for Liara; for Kaidan and Ashley, and possibly for everyone else <B>except</B> Liara, the collection quests may be skippable as long as you do the rest of the Sidequests and make sure you visit every planet. I personally have a list at this point, so I can check off what systems have been surveyed and landed.<BR><BR>I can't wait until the Gamefaqs guru's figure this all out.