They didn't adjust for inflation, which makes this list pretty meaningless. For example it says donkey kong made 4.4 billion USD in 1981, and then list it as below the 5 billion earned by wii fit in 2005, but 4.4 billion dollars in 1981 is worth way more than 5 billion in 2005. Adjusted for inflation, 4.4 billion dollars in 1981 is equivalent to 9.5 billion in 2005 dollars.
They didn't adjust for inflation, which makes this list pretty meaningless. For example it says donkey kong made 4.4 billion USD in 1981, and then list it as below the 5 billion earned by wii fit in 2005, but 4.4 billion dollars in 1981 is worth way more than 5 billion in 2005. Adjusted for inflation, 4.4 billion dollars in 1981 is equivalent to 9.5 billion in 2005 dollars.