The sale, representing 6.4 percent of the company, generated $2 billion.
But that is not just because every sale of the game will generate a royalty for Microsoft.
Despite the loss, the sale will generate badly needed cash.
The sale will generate a cash gain of $56 million, Mead said.
It was hoped that the sale would generate £5M towards the museum.
The sale generated a loss, but officials said they had not yet calculated the amount.
Scheduled for March 29 and 30, the 282-lot sale is already generating a lot of buzz.
At today's closing price of $24.50, the sale would generate only $294 million.
Analysts expect the sale to generate at least $2 billion.
The latest sale, on July 10, generated $26.2 million at a price around $36.62 a share.