This will just be a list of endings, what CGs you'll get and the choice needed to get them. The hints should be good enough to get you to a certain ending. Otherwise I just provide the choice that will result in that ending. When and where to use it is up to you to figure out.
Initial CGs: Main Menu, Salute
Ending #1: Lost in the fog
Hint: Listen to what your doctor recommends
Skipping this ending unlocks the CG: Flute of Sorrow
Hint: Sometimes you have to be destructive to save humanity
Skipping this ending unlocks the CGs: Victory, Showdown with Stan
Hint: The bastards should pay for what they've done!
Hint: You must trust your superiors
Hint: Never trust the government!
CG: True End