Didn't have problems keeping anyone alive, so I don't know what's going on.
I can say that I used everyone at least on one mission that wasn't their own, however (except for Legion, whom I didn't have long enough).
Everyone was loyal except for Legion, because I did the dead Reaper ship last, and the abduction happened as soon as I went for the Legion loyalty mission. I rush through the relay after that. I also didn't get his sniper rifle upgrade because the loyalty mission in progress closed off that conversation choice.
Specialist: Tali
1st/2nd Leaders: Miranda
Escort: Jacob
Barrier: Samara
Final Battle: Garrus, Thane
It's possible that the speed at which you run through the fight affects things, especially the final battle. I was pretty fast -- using adrenaline rush + inferno ammo + machine gun.
It's also possible that the way you resolve their loyalty mission affects how the endgame turns out. e.g. you let Mordin shoot or not shoot the scientist (I stopped him), or possibly minor conversation choices throughout the game.
Modifié par Empiro, 31 janvier 2010 - 11:19 .