Achievements

This is a complete list of all achievements available in Portal, Portal: Still Alive and Portal 2.

Achievements are sets of challenges or goals (from finding a secret room to finishing a test chamber in a certain time or with a limited number of portals) that give a acknowledgement to the player for this special actions while playing the game. When a player obtains an achievement, a little black window on PC or the usual green message on Xbox will appear on the screen to inform him of the achievement he just obtained.

All achievements can be completed at any time in the game, eventhough certain achievement are story related and can only be unlock when reaching a certain point in the scenario.

Trivia

 * The Transmission Received achievement was added on Steam on March 1st 2010 as part of the Portal ARG, that added 26 radios to the game delivering coded messages hinting toward the future announcement of Portal 2.