 Portal 2 was released a few days before the PlayStation Network outage . Gamasutra analyst Matt Matthews said that , based on NPD Group data , the outage " did not seriously affect retail sales of software " , but some developers did report drops in sales . <unk> analyst Joe Anderson expected that the effect of the outage on UK sales of Portal 2 would be mild . On June 22 , Newell announced that Portal 2 had sold 3 million copies . As of July 2011 , Electronic Arts stated that more than 2 million copies of Portal 2 have been sold by retailers worldwide . In an August 2011 interview , Newell stated that " Portal 2 did better on the PC than it did on the consoles " . Upon release of the Perpetual Testing Initiative in May 2012 , Newell stated that Portal 2 had shipped more than 4 million units , with the personal computer versions outselling the console versions . Overall , Portal and Portal 2 had together shipped more than 8 million units . 
