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DeJa VuCollection by Audiotrash
A Portal 2 Single player modification. This is Aperture from Portal 1, completely rebuilt from memory and with a my own spin on design and puzzles. I will be using the workshop for public testing, so feel free to add me for feedback, or just leave com
Shift: TrichotomyCollection by Aicxe
Somewhere in the multiverse, two intertwined Aperture Science labs have invented a way to link universes together. With the 1.21-Gigawatt Aperture Science Multi-Dimensional Multi-Generator, the test subject now has the ability to solve tests that span acro
10 Reasons for ReassemblyCollection by Yesber
Difficulty: Medium/Hard Theme: Destruction Estimated Playtime: ~3 hours Hello dear testsubjects! 10 cooperative testchambers signing in, I hope you you'll enjoy and as always try to give me any thought about the maps in return, it makes difference
NYS SeriesCollection by Nyskrte
A series of five difficult levels. If you are looking for instant gratification, leave now. Compliments and criticism are appreciated. Use Quicksave/Quickload with care. Average expected playthrough time: 3 to 6 hours. Average test completion succes
ElementaryCollection by nicklonium
A series of concept test chambers centered around the periodic table of elements. Each room themed, in title, description and design, on a chemical element. Don't forget your goggles and lab coat, and remember, safety first!
D S.E.R.I.E.S.Collection by Drakulo
The "D S.E.R.I.E.S." is a collection of beginner to medium difficulty test chambers. "S.E.R.I.E.S" is the acronymm of : Short, Extendable and Rapturous Introduction to Experimental Self-improvement. If you want to relax in simple and fun maps, you're
The InqusitionCollection by srs bsnss
Set after the awakening of GLaDOS, you are taken through a testing track involving the Matter Inquisition Field - a yellow fizzler that blocks portal shots, and destroys cubes, but doesn't close portals. The puzzles gradually get more difficult as you make
The Cake ChroniclesCollection by Acid Regulation
9 Chapters, where each chapter has a different method of solution. I tried to keep the puzzle style of the singleplayer. Difficulty: easy/medium.
Quantum EntanglementCollection by rendermouse
This is the official collection for the Quantum Entanglement series of maps for Portal 2. There are only two available right now, but there will be more maps added as they get constructed.
Pneumatic Diversity TestsCollection by Nobi-Knobi
In Pneumatic Diversity Tests you start in a brand new Testing-Track just finished and partly under construction. While you are the first testsubject that is exploring the new chambers, you have to make your way through the Pneumatic Diversity Tests, a r
re:Escape From ApertureCollection by Anachronistic ALLOS
A remake of my classic series Escape From Aperture, made to look moreso proper than it did before. You are a test subject named Mark Bendest, and you must Escape from Aperture! I spent a long time remaking the Escape from Aperture series as my last
A Little HigherCollection by Reepblue
Jump A Little Higher! A Little Higher is a small mappack containing 5 short, and simple puzzles using a new element, The Repulsion Cube. With this new element, players can control the Repulsion Gel at their will to solve puzzles.
Active Test SubjectCollection by Higgi
You are a Stock-Piled test subject, just now being woken up for testing. ...but it feels like something is changing.
DooM (and other Games)Collection by carl.kenner
High quality conversions of other games to Portal 2, with their original maps, graphics and sounds. My DooM and Wolfenstein levels, and Timoteeei's excellent Minecraft levels.
Mari0Collection by dusuarez
Mari0 Portal (stabyourself.net/mari0) is a Mario game with Portal physics. I made these maps closest as possible to Mari0's Portal levels considering the Perpetual Testing Initiative limitations. This was the first collection to appear in Workshop, but
Lil' Gideon's Collective CollectionCollection by Lil' Gideon
This collective collection collectively collects all of my (Lil' Gideon's) Portal 2 Perpetual Testing Initiative Test Chambers. Portal, bounce, speed, and fly through (CHAMBER AMOUNT HERE) exciting test chambers!
Azorae's Grand DesignsCollection by Azorae
"Curves and lines of Grand Designs Against the run of the mill Swimming against the stream... We break the surface tension With our wild kinetic dreams" -Rush, Grand Designs, 1985 Welcome to my collection of Portal 2 test chambers. Included is
THE CORE: RELOADEDCollection by CosmicD
You are a test subject in the Aperture Science lab who winds up in another "puzzling" situation. You are also in a race against an ever wicked "test dungeon master" trying to make life hard and success a relative term. What's up with GLaDOS anyway ? Has