How many End game is/are there?

Is there really only one end-game for Phoenix Point, the Last Resort?

I thought those three factions had something up their sleeves, 4 possible endings. I waited, and waited and waited the last 3 days until I effing just went for the Last Resort.

there are 4. Each of them is behind a tech. I believe getting one of the techs locks out the others though.

:edit: here is a link that includes them behind the spoiler tags

Hmm… maybe that was it… I researched the Viophage and that must have locked out the other 3 endings.

gotta load up an earlier save then.