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For other uses, see Portal disambiguation. First-person shooterpuzzle video game. Single-playermultiplayer co-op. Electronic ArtsSteam. Mac OS X Portal 2 is the sequel to Portal. First hinted in the update made to Portal in March as part of the Portal ARGit was announced on March 5, to be released in fall but was later announced on June 9, as delayed until an unspecified date in Portal 2 is a first-person perspective puzzle game. Players take the role of Chell in the single-player campaign, as one of two robots - Atlas and P-Body in the cooperative campaign, or as a simplistic humanoid icon, nicknamed "Bendy" in community-developed puzzles.
Characters can withstand limited damage but will die after sustained injury or after falling into bottomless pits or toxic waste. While most of the game takes place in modular test chambers with clearly defined entrances and exits, other parts occur in behind-the-scenes areas where the objectives are less clear. The initial tutorial levels guide the player through the general movement controls and illustrate how to interact with the environment. The player must solve puzzles using the Aperture Science Handheld Portal Devicewhich can create two portals connecting two distant surfaces.
Outlines of placed portals are visible through walls and other obstacles for easy location. New testing elements include Thermal Discouragement BeamsExcursion Funnelsand Hard Light Bridgesall of which can be transmitted through portals; Aerial Faith Plates launch the player or objects through the air. The Weighted Storage Cube has been redeed, and there are new types: Thermal Redirection Cubeswhich have prismatic lenses that redirect laser beams, spherical Edgeless Safety Cubesand Frankenturrets - cube-turret hybrids created by Wheatley after taking control of Aperture Science Enrichment Center.
Newly introduced Mobility Gels impart certain properties to surfaces or objects coated with them, themselves dispensed from pipes and transported through portals. Players can use the Propulsion Gel to cross surfaces more quickly, Repulsion Gel to bounce from a surface, and Conversion Gel to allow surfaces to accept portals. Only one type of gel can be effective on a certain surface at a time only. Some surfaces, such as grilles, cannot be coated with a gel. Cleansing Gel can block or wash away other gels, returning the surface or object to its normal state. The game includes a two-player cooperative mode.
Two players can use the same console with a split screen, or can use a separate computer or console; Microsoft Windows, macOS, and PlayStation 3 users can play with each other regardless of platform; a patch provided in late added split-screen support for Windows and macOS users under "Big Picture" mode. Both player-characters are robots that control separate portal guns and can use the other character's portals.
Each player's portals are of a different color scheme, whereof one is blue and purple and the other is orange and red. A calibration chamber separates the characters to teach the players to use the communication tools and portals. Most later chambers are less structured and require players to use both sets of portals for laser or funnel redirection, launches, and other maneuvers.
The game provides voice communication between players, and online players can temporarily enter a split-screen view to help coordinate actions. Players can use the ping tool to draw the other player's attention to walls or objects, start countdown timers for synchronized actions, and perform t gestures such as waving or hugging.
The game tracks which chambers each player has completed and allows players to replay chambers they have completed with new partners. According to Valve, each of the single-player and cooperative campaigns is 2 to 2. Portal 2 contains in-game commentary from the game developers, writers, and artists. The commentary, accessible after completing the game once, appears on node icons scattered through the chambers.
After the success of PortalValve decided to make Portal 2 a standalone product, partly because of pressure from other developers within Valve who wanted to work on a Portal product. Participants in internal review processes were inspired by what they saw to the project. According to Erik Wolpaw, some Portal 2 developers worked on the Left 4 Dead games to help them meet milestones, but returned to Portal 2"with extra people in tow. 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.
Early in its development, the development team planned to exclude portals from Portal 2. Though the new mechanics prompted some positive feedback, every playtester expressed disappointment at the omission of portals. Johnson stated that Valve's aim was not to make Portal 2 more difficult than its predecessor, but instead to produce "a game where you think your way through particular parts of the level, and feel really smart when you solve it.
The first type, which Valve calls "checklisting", provides a relatively safe environment for player to experiment with a new gameplay concept; the second type combines elements in new ways to force the player to think laterally, providing challenging and rewarding puzzles. Chambers were first developed through whiteboard via isometric drawings. The developers performed a sanity check on the chamber before crafting simple levels with the Hammer level editor.
Extensive play-testing ensured the solutions to each chamber were neither too obvious nor too difficult, and observed alternative solutions discovered by playtesters. Based on play-testingthe de team retained these alternative solutions or blocked them if they were considered too easy.
For example, the Energy Spheres used in the first game were replaced with lasers, which provided immediate feedback and reduced the in-game training time. The de team replaced low resolution textures from the first game with higher-resolution, dirty textures that the new game engine could support.
Portal 2 integrates a game mechanic from Tag Team's Tag: The Power of Paint : paint-like gels that impart special properties to surfaces or objects they coat. Impressed by TagValve hired its creators to develop the mechanic further and only later decided to include it in Portal 2.
Using the third Tag gel, which allows the character to walk on any coated surface regardless of gravity, gave playtesters motion sickness. It was replaced by Conversion Gelwhich integrates with the portal mechanic. Portal 2 uses advanced rendering techniques developed for Left 4 Dead 2 for rendering pools of liquid; Portal 2 combines "flowing" surface maps to mimic the motion of water with "debris flow" maps and random noise to create realistic, real-time rendering of water effects.
The cooperative gameplay originated from players' requests and from anecdotes of players working together on the same computer or console to solve the game's puzzles. Wolpaw likened this to players working together on the same computer to solve point-and-click adventure games. As soon as a playtester discovered a way to complete a puzzle with one set of portals, the level was sent back to the deers for further work.
Some of the puzzle chambers were deed asymmetrically; one player would manipulate portals and controls to allow the other player to cross the room, emphasizing that the two characters, while working together, are separate entities. Valve considered adding a competitive mode to Portal 2. According to Wolpaw, the mode was similar to the video game Speedball ;  one team would try to transport a ball from one side of the playing field to the other using portals, while the other team would attempt to stop them with their own use of portals.
Matches would commence with this objective in mind, but quickly descended into chaos.
Valve realized that people enjoyed solving puzzles with portals more and therefore they focused on the cooperative mode. Wolpaw said that while some developers have been moving towards art games, no one had made a comedic video game. The team returned to the idea of exploring parts of the facility from Aperture's early days, and reincorporated Johnson through a series of recordings. The writers originally conceived several premature joke game endings if the player performed certain actions, but these required too much development effort for little payback and were scrapped.
One of these joke endings was triggered by shooting a portal onto the moon's surface, after which the player's character would die from asphyxiation over a closing song, but the idea of creating a portal on the moon was incorporated into the game's final ending. As a reward, the Animal King would have married Chell to a turret, which would have followed Chell around the game without visible movement.
The writers hoped to use this idea to make the robots human-like for testing purposes, but recognized that unlike the captive audience of the single-player campaign, the two players in cooperative mode may simply talk over the story, and thus the story was condensed into very basic elements.
Wolpaw said that while many story elements of Portal are revisited in Portal 2he avoided some of the memes —such as the frequently repeated "the cake is a lie". He said, "if you thought you were sick of the memes, I was sick of it way ahead of you".
The writers saw Aperture Science itself as a character. It is depicted as a "living, breathing place",  and "a science company that's gone mad with science. Building itself out of itself. McCormick also likens Wheatley to Prometheus' foolish brother Epimetheus. Within the game, a sentry gun makes reference to the Prometheus myth, the word "Tartarus" is visible on the supporting columns in the depths of Aperture Science, and a portrait of Cave and Caroline also shows Aeschylus, the pd author of Prometheus Bound.
Though Portal 2 introduced some new characters, the writers wanted to maintain the one-on-one relationships between each character and the player-character. The playtesters accepted playing as a different character for the first part of the game, but they became disoriented when GLaDOS did not recognize them. The writers returned to using Chell, the protagonist of Portal.
As part of her character arc, the plot moves GLaDOS from her anger with Chell for her actions in Portalwhich Wolpaw said "was going to get old pretty quick", to an internal struggle. To remedy this, they created the Caroline subplot to give GLaDOS an external situation to deal with and to drive the story during the middle act of the game. The writers considered introducing about six personality cores stored in portable spheres,  whose main function would be story advancement.
Ultimately they decided to concentrate on a single core, Wheatley,  recycling two of the rejected cores in the final boss fight. Pictures of Cave Johnson, based on the face of lead animator Bill Fletcher, appear throughout Portal 2.
The deers initially planned to use Chell and a new human character called " Mel ". GLaDOS' dialogue would play off the humans' "image issues", and this aspect was retained after the deers switched to using robots. The writers also tried adding lines for GLaDOS that would encourage the players to compete against each other for rewards, such as meaningless points, but playtesters did not respond well. Instead, using their experience from games, Faliszek and Wolpaw kept the story and key comedic lines short, and repeated them frequently. Swift said multiplayer Portal was technically possible, but that it was "less fun than you'd think.
Portal 2 was officially announced on March 5, via Game Informer. Events during the preceding week foreshadowed the announcement. On March 1, Valve released a patch for Portal that included a new achievement, "Transmission Received", requiring the player to manipulate in-game radios. This revealed new sound effects that became part of an alternate reality game. A second Portal patch released on March 3 altered the game's ending sequence to show Chell being pulled back into the Aperture Facility by the Party Escort Bot.
This prompted speculation that the surprise would be the announcement of Half-Life 2: Episode Three but Valve confirmed that it would be about Portal 2. The March announcement said that Portal 2 would be released in lateSeeking portal 2 coop player
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'Portal 2' is a dark, humorous joy (and that's no lie)