Enigma Protocol is an upcoming mod for Portal 2 that explores the remains of Aperture after the fall of GLaDOS.

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Portal: Citrus

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Portal: Citrus is a Portal 2 modification, which takes place in middle of 1995 in one of the departments of Aperture Science called Collaborative Production...

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APERTURE'S HOUR fills the gap between Portal & Half-Life by giving a look at Aperture Laboratories during the Black Mesa Incident and the resulting...

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Welcome to the Portal: Fading lab page, here we will officially publish content about the ongoing development of our mod.> The mod is not completely canonical...

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The idea behind this is to make an episodic mod, which you can play as it grows and every new chapter will be based on a whole new theme. The basic concept...

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Solve puzzles with paint! In this mod for Portal 2, you have 3 paints at your disposal to solve puzzles in new and unique ways using the Paint Gun!

Portal: Next

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This mod is alternate to Portal 2. GLaDOS is destroyed and spent about 100 years until Aperture old workers who had escaped from the Enrichment Center...

Portal: Virus Outbreak

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Portal: Virus Outbreak (P:VO) [OLD Name: Portal Stories: Virus Outbreak PS:VO] is a mod for portal 2 that's continued Aperture Science story after an...

Backstock

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Coming ????, a new captivating puzzle campaign. Backstock teaches you new puzzle solving techniques, and demands you don't fall behind. Discover the future...

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A mod that not only remakes Portal 1 in Portal 2, but also hopes to add new stuff to it as well

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In a room full of electronics that has been reconstructed after the Wheatley incident, some androids discover a strange "Atlas" model. One core recognizes...