Uhhhh... Earth death spiral scenario using a 0.03 AU speed AND with conventional start.
So evil. I like it....
Set starting pop to 7.5 billions for increased sadism. How many can you save?
EDIT: oh, of course you MUST roleplay it. You must actively try to save as many as possible, not just use the 7.5 billions pop to accrue wealth and minmax research.