You knew about the acclaim, but you may not have known that it has moved approximately four million copies in the past four years. What's really surprising, however, is that Valve reached that sales mark without including the numbers for Steam -- numbers that would muddle the accuracy of that four million in terms of actual sales, given that Valve has offered the game free through Steam at various times.
It's also unclear whether that number includes individual copies of Portal sold at retail, the Xbox Live Arcade release (Portal: Still Alive), or any other sales channels. We've reached out to Valve for clarity on the total sales of Portal, but for now, four million is nothing to sneeze at -- especially considering the game's humble origins.
- Key specs
- Game format Optical disc, Downloadable
- Online features Multiplayer, Voice chat, Video chat, Store, Browser
- Drive capacity 250 GB
- Controller type Wired, Wireless
- Motion controls Accelerometer, Gyroscopic
- Video outputs HDMI (v1.3), RCA / composite
- Released 2012-09-25
Microsoft Xbox One