Before "Fortnite" and "Candy Crush," before "Super Mario Bros." and "Tetris," in fact, even before things like VCRs, Post-its, email, and hacky sacks, eight young MIT students came up with a truly novel idea that ended up becoming not just one of the first video games of its kind, but one of the first video games ever. Their excitement is still palpable in the game's title, "Spacewar!" The game essentially launched what today Smithsonian Magazine estimates as a $140 billion industry, with games as varied and ubiquitous as the devices they are played on. All modern-day players and developers owe…