My interpretation of the title - massive spoilers!Proverbial Jon said:snip
I think it referred to Ellie and Joel having nobody else left in the world.
You see many examples of 'couples' throughout the game Billy &his lover friend, Tess, Joel's daughter, Henry and his lil brother Sam, Tommy &his wife. All these people had someone to fight for.
The order in which you meet them is important; Billy and Tess were met at the start and hid their feeling except for briefly in a moment of weakness.
The Henry commits suicide when he loses the one person he was fighting for
Tommy survives by marrying.
Couple this with Ellie saying that everyone she ever cared about left her or died and Joel saying something along the lines of 'I struggled a long time with surviving ....you need someone to fight for'
So I think it's referring to Ellie and Joel. Joel and Ellie did potentially doom all of humanity by deciding to be together at the end
You see many examples of 'couples' throughout the game Billy &his lover friend, Tess, Joel's daughter, Henry and his lil brother Sam, Tommy &his wife. All these people had someone to fight for.
The order in which you meet them is important; Billy and Tess were met at the start and hid their feeling except for briefly in a moment of weakness.
The Henry commits suicide when he loses the one person he was fighting for
Tommy survives by marrying.
Couple this with Ellie saying that everyone she ever cared about left her or died and Joel saying something along the lines of 'I struggled a long time with surviving ....you need someone to fight for'
So I think it's referring to Ellie and Joel. Joel and Ellie did potentially doom all of humanity by deciding to be together at the end