Quick, can you name the most popular (in terms of units moved) games for the Atari 2600? The Nintendo Entertainment System? The Sega Genesis? The Super Nintendo? If you know your console history, you can name them without having to check any sales figures: Combat , Super Mario Bros. , Sonic the Hedgehog , and Super Mario World , respectively. This doesn't come from rote chart memorization, but simple logic: these were the initial games included when you bought a new system in North America, so every single household with the first round of one of these consoles also had a copy of these games. (Unless it got stepped on, the dog chewed on it, a younger household member decided the cartridge needed a bath, etc.) Okay, Sonic is a bit more complicated, since the Genesis originally shipped with comparatively lesser-known arcade port Altered Beast (although if you are familiar with the game, you probably immediately said "wiiise fwom your gwaaave" out loud upon reading the tit...