Can I have source for your skyward sword sales? Cos Nintendo released 1st weekend sales off 3.8million then no more so how do you know lifetime to date?
VGChartz tracks video game sales. It has Skyward Sword at 3.89 million http://www.vgchartz.com/game/45669/the-legend-of-zelda-skyward-sword/
The better question is where is your source for selling 3.8 million first weekend?
Considering the game released in November and it hit 3.42 million in January and then 3.52 million 5 months after release in April, I doubt there are any legitimate sources that say 3.8 million first weekend.
VGC is actually a couple hundred thousand behind at both times, but considering that 3.42m and 3.52m would both be shipped while VGC tracks sold it is fair to assume that it is probably about right.
Bet Shiken that COD would outsell Battlefield in 2018. http://gamrconnect.vgchartz.com/post.php?id=8749702