Nintendo has been in gaming for 5 (technically 6) of the 7 generations. Microsoft has only been in it for 2 and Sony only 3. Nintendo has delivered more games and more memorable games and franchises than any other company if by no other virtue than the fact they've been at it longer. Granted, these games may not have stollen the market's thunder upon release, but they are games that have the lasting power to maintain a love up until this day. Both Sony and Microsoft have had their gems but they are far and few inbetween, each company up until this generation favoring a heavy third party driving force over a first or second party. Many of these greats are determined by lasting power and that requires most important of all time, newer titles like Shadow of the collossus, Okami, God of War, Halo, Gears of War and Bioshock will have a hard time maintaining a lead for very long in those charts given their recent emergence as not only games, but franchises. The three most memorable franchises, Zelda, Mario and Metroid will always have that lasting power and be an asset to Nintendo's place on this list, so let's not forget those.