I'm a self-proclaimed Game Endings Master. I maintain the VGMuseum and frequently post game ending screenshots for lots of games.
I also wrote a book about game endings, titled "The NES Endings Compendium: Years 1985-1989". In it, I describe a game's ending accompanied by screenshots and sprites. Every NES game released between 1985 and 1989 is covered in the book. The design of each page is purposely reminiscent of gaming magazines from the 90s, such as EGM and Nintendo Power.