Just as the title says how fast can you beat the various games?
I can finish AO in about two to three hours IF I don't make an effort to save anyone, its around three and a half to four hours if I save just enough to get the good ending.
AE I can finish in a day with all 300 rescues, if I do only that all day
if I take a couple of breaks I can have it fully finished in two.
MO usually takes two to three days with every save mainly because I get too bored with the game to do it all in one sitting. If I really tried and spent the the day only playing that I could probably have it done in a day or two for both endings.