Now the #1 selling PC game of all time with 16 million copies sold! WOO! Credit to http://tinyurl.com/jwplb8u where I found this out at
That's only because separate versions and expansion of games don't count. Otherwise WoW would be #1 (Which has sold many many more millions) Also the graph is inaccurate, because The Sims 2 has sold over 20 million copies, http://i.imgur.com/Cp7e2j6.png
Quoted from the page- "Subscription figures for massively multiplayer online games such as World of Warcraft or Lineage are not taken into account as they do not necessarily correspond to sales." As for the sims, blame the graph