For decades, most developers wanted to make something as realistic as possible. Some preferred to stick to cartoony fun, but "realistic (x)" features were big selling points for games back in the day. Metal Gear Solid’s nuclear biped tanks were fiction, but the Socom, FAMAS, and Stinger missiles were real weapons. The cars in Gran Turismo were meant to handle like the real deals. Mortal Kombat digitized real actors to add to its darker atmosphere.