I heard killing Sis only affects the game in 3 ways : lowered chance of alliance with G22 ,altered conversation after killing her (through the TV) , can't do contact Albatross mission , if you select Albatross as handler for the final mission you get to rub it in (is this true?). Any other consequences or dialogue instances or any changes in dialogue aside form the ones listed ? I heard, aside from those instances , dialogue with Albatross is like nothing ever happened in that regard. I have to decide based on how much of an effect this choice will make, i don't have much time these days and would hate to waste a playthrough if i don't see something new. Thanks.