The ending where Max pulls a Heroic Sacrifice so that all the people on Earth can become citizens of Elysium.
How it came to be: Spider, a criminal who made money out of sending desperate people on Elysium so they could use a medbay, discovered the data Max had stolen from him would allow a reboot of Elysium's mainframe with all kinds of addition... And the only thing he thought to do with it was to made everyone on Earth a citizen of Elysium. And then he went to do just that alongside Max, allowing billions to finally receive the medical care they desperately needed.
Max's coworkers trying desperately to get him out of the radiation chamber.