History of Video Game Developers: in easy to read flow chart form

My eyes are blurring over...

My Personal Game Reviewer popped out of his closet long enough to show me this incomprehensible flow chart from Games Are Evil.

I've been staring at it for so long I just lost the vision out of my left eye. Is that bad? I can shoot Zombies with just one eye, can't I? I was never that accurate anyway.