Portal is a 2007 first-person puzzle-platform video game developed by Valve Corporation. The game was released in a bundle package called The Orange Box for Microsoft Windows and Xbox 360 on October 9, 2007, and for the PlayStation 3 on December 11, 2007. The Windows version of the game is available for download separately through Valve's content delivery system Steam and was released as a standalone retail product on April 9, 2008. A standalone version called Portal: Still Alive was released on the Xbox Live Arcade service on October 22, 2008; this version includes an additional 14 puzzles. An OS X version was released as part of the Mac-compatible Steam platform on May 12, 2010. A Linux version was released on Steam as a beta on May 2, 2013, and came out of beta on June 24, 2013. An Android port for the Nvidia Shield was released on May 12, 2014.
The game primarily comprises a series of puzzles that must be solved by teleporting the player's character and simple objects using "the Aperture Science Handheld Portal Device", a device that can create inter-spatial portals between two flat planes. The player-character, Chell, is challenged by an artificial intelligence named GLaDOS (Genetic Lifeform and Disk Operating System) to complete each puzzle in the Aperture Science Enrichment Center using the portal gun with the promise of receiving cake when all the puzzles are completed. The game's unique physics allows momentum to be retained through portals, requiring creative use of portals to maneuver through the test chambers. This gameplay element is based on a similar concept from the game Narbacular Drop; many of the team members from the DigiPen Institute of Technology who worked on Narbacular Drop were hired by Valve for the creation of Portal. Portal was acclaimed as one of the most original games of 2007, despite being considered short in length. The game received praise for its unique gameplay and darkly humorous story. It received acclaim for the character of GLaDOS, voiced by Ellen McLain in the English-language version, and the end credits song "Still Alive" written by Jonathan Coulton for the game. Not counting sales through Steam, over four million copies of the game have been sold since its release. The game's popularity has led to official merchandise from Valve including plush Companion Cubes, as well as fan recreations of the cake and portal gun. A sequel, Portal 2, was released in 2011, adding several new gameplay mechanics and a cooperative multiplayer mode.
- 71203 Level Pack
- Cave Johnson
- Space Core
- Cake Core
- Adventure Core
- Mantis Men
- Animal King Turret
- Doug Rattmann
- Aperture Science Enrichment Center
- This is one of the few franchises in the game that had all of its main actors return to record new lines.
- The game appears to focus on the first game in GLaD to See You, and on the second game in the Adventure World.
- The Aperture Science level included with Chell is based on an original story that takes place after the second game. This level also has a connection to LEGO Dimensions.
- The sound of a Shift portal is the sound an excursion funnel from the game Portal 2 uses.
- Along with The Wizard of Oz and Midway Arcade, this is one of the only Year 1 franchises that did not have any LEGO sets previously based on it, including in the LEGO Ideas line.
- However all three had been pitched to LEGO Ideas and had received notable attention before being rejected by the LEGO Group.
- Portal 2 and Half-Life exist in the same universe. This is referenced via various Black Mesa boxes located in the Adventure World and levels.