Add more Bosses, Types of Zombies, and make the game more customisable like being able to change what gun your partners use during the game or telling them which zombies to focus on or not shoot at.
Let me warn you all now before you embark on this seemingly impossible quest. Once you get all the stats from the stat tree, there is not enough to get 100 for all 3 skills in each of the 4 categories. I know. Tragic.
I'm a bit confused as to how this fits in with Fixation. So Kathryn dies after he opens up the gate to let her go home, then because of his medication, he forgets that it ever happened. Plus he went home. So maybe Kathryn called paramedics to take care of his when she got home before she dies? I don't know.
My first girlfriend dies of cancer, then after one date, the second kills herself. Then in the question with the gang, it says I "could have died". and then I die.