Huh? I think it's more like this:
Actual final campaign mission = Good ending. The Resistance leaves the Ark. The Security recovers a healthy situation.
Alternative "What If" mission = Bad ending. The Resistance make a reactor blow up, destroy the Ark. The Security reduces the population to 5.000.
OR
My ending: I get elected the GOD KING OF THE ARK and i fix all the problems with my undead army, who consume everyone but a select few, such as everyone with a fun/funny accent, cool people, and most of the people on the forums :wink_smile: , after that i get some people to install giant turbine things that let me control the ark, i then drive it into some land mass and we take over. The end. :celebration: