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ElectrophobiaCollection by Mevious
Three medium to very difficult co-op testing spheres focusing on fizzlers and how they are the bane of your robot existence. No strict timing or advanced/ninja techniques are required. This was made for the 2011 Thinking With Portals Summer Mapping Compe...
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!
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 acr...
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 succe...
Enigma ProtocolCollection by Metallic Hero
This is the collection of Steam workshop maps previewing the upcoming mod for Portal 2, Enigma Protocol. Please keep in mind, this collection is a work in progress, and not all maps are available at this time.
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 co...
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'r...
No ElementsCollection by Mevious
This is a collection of chambers by Azorae, Gig, Juggler, and Mevious which use no interactive testing elements. That means no buttons, cubes, funnels, lightbridges, gels, lifts, fizzlers (except the ones as part of the exit rooms), etc. Slanted platforms...
10 Reasons for ReassemblyCollection by Cedric Diggerdy
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...
Chrono Occurrence (WIP)Collection by S̲t̲i̲m̲i̲c̲h̲
In this new adventure you take control of a testing robot who will test the new time control button devices. Pause time or slow down time to accomplish things you couldn't before! Special thanks to: Sumeron - Professional SFX tester, voice acting,...
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.
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, bu...
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!
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 ...
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...
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.
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.
Portal 2 co-op ChambersCollection by Whiskey_Fox
A collection of co-op Test Chambers to play with my friends!