How many endings must I see in Deus Ex to earn the "Deus Ex Machina" achievement?

I've seen 2 endings by now and I'm wondering how many is required for the achievement.

Any clues on how to get them would also really be appreciated.


I'm... not quite sure how to answer your question. There are 4 different endings in the game, each with its own button. Press the button and you get the ending you choose.

Eliza tells you the ramifications of each ending.


There are 12 in fact, depending on your actions, 3 will be available as choices, the 4th one always the same: the destruction of the installation.