According to the OP in this thread http://gamrconnect.vgchartz.com/thread.php?id=119445&page=1&str=60096205#8

Enslaved has sold 800k copies, thats according to namco bandai apparently, but vgchartz has it tracked at about 200k last i checked. can anyone shed some light on this issue, because it might not have been the disaster we all think if thats the case....