The Unified Pac-Man/Space Invaders Theory of the Universe

Welp, it seems that every ambitious person has at least one explanation of the universe and how it works and all that kind of stuff. Many aspire to be Einstein but few do that well. The important thing, of course, is to try. Which is why I'm trying to reduce my own personal universe to as few elements as possible... something like that. With video games, it should be easy. So if you had to pick two games from which all other games seem to spring, Pac-Man and Space Invaders are about it. It seems you're doing one menial task or another in video games: you're either eating or shooting. There's no shooting in Pac-Man; no, you have to burn calories to achieve your goals. There's no eating in Space Invaders, just the endless shooting. Same with Asteroids, Centipede and Millipede. At least in Doom, there's balance. There's plenty of shooting, but you do have to eat food and collect supplies. Damn Vista. Sigh, I miss Doom. I could really shoot some demons right about now. Anyway, with my collection of Atari games there's a giant family tree to construct! Better run...