Conly and the player traverse the experimental test chambers, eventually reaching the base of the Spire. There, she meets up with Emilia Conly, a former Aperture employee whose mind has been copied into a core. The malfunction causes the protagonist to be teleported to an older experimental testing track. The protagonist enters the device control room and Stirling instructs her to test it by teleporting a short distance, but it malfunctions.

Stirling explains that this device expands on Aperture's previous work with teleportation, allowing him to use it to reassemble and activate GLaDOS. Traversing both maintenance areas and test chambers, they reach the 'Spire' where this device is located. He asks for the protagonist's cooperation in exchange for setting her free. The game begins with the protagonist being awoken by a maintenance personality core, Stirling, who tells her that she is being trained as part of an 'emergency response team', and instructed to solve a series of tests.Īfter completing them, Stirling reveals that he was misleading her, and his real goal is to activate a powerful device which will restore Aperture's laboratories to full operation. In game, the player assumes the role of an unnamed test subject in the dilapidated laboratories of Aperture Science. Portal: Revolution serves as a prequel for Portal 2, being set after the events of Portal. See also: Setting and characters of Portal (series) A significant number of puzzles in the first half of the game only allow the player to control one portal, with the other being placed in a fixed position. Some test chambers also add switches that can turn off the power, which disables barriers but also turns off devices that help the player. It also reintroduces 'Pneumatic Diversity Vents' which can suck up other test elements these were removed from the original version of Portal 2 during its development. Īdditionally, the mod incorporates several new gameplay elements such as a shower that cleanses gel and paired cubes that facilitate the transportation of laser beams. They can also coat the chamber in gels, which can adhere to surfaces to make the player bounce or slide across them. Players use a gun to manipulate the environment using portals, interacting with mechanics such as buttons and cubes. Like in the official games in the Portal series, Portal: Revolution's gameplay is based around solving puzzles in 'test chambers'.

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