 Project manager Erik Johnson said Valve 's goal for Portal 2 was to find a way to " re @-@ surprise " players , which he considered a " pretty terrifying " prospect . In March 2011 , one month before the game 's release , Valve president Gabe Newell called Portal 2 " the best game we 've ever done . " After Portal 2 's release , Geoff Keighley wrote that according to Newell , " Portal 2 will probably be Valve 's last game with an isolated single @-@ player experience " . Keighley later stated that the use of the word " probably " suggests that " this could change . " Newell said that Valve is not " giving up on single @-@ player at all " , but intends to include more social features on top of the single player experience , akin to the cooperative mode in Portal 2 . 
